/* gGraphView Implementation
 *
 * Copyright (c) 2019-2022 The OSCAR Team
 * Copyright (c) 2011-2018 Mark Watkins <mark@jedimark.net>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file COPYING in the main directory of the source code
 * for more details. */

#define TEST_MACROS_ENABLEDoff
#include "test_macros.h"


#include "Graphs/gGraphView.h"

#include <QDir>
#include <QFontMetrics>
#include <QLabel>
#include <QPixmapCache>
#include <QTimer>
#include <QFontMetrics>
#include <QWidgetAction>
#include <QGridLayout>
#include <QVBoxLayout>
#include <QDockWidget>
#include <QMainWindow>
#include <QScreen>
#include <QWindow>
#include <QMessageBox>


#ifdef DEBUG_EFFICIENCY
# include <QElapsedTimer>
#endif

#include <cmath>

#include "mainwindow.h"
#include "Graphs/glcommon.h"
#include "Graphs/gLineChart.h"
#include "Graphs/gSummaryChart.h"
#include "Graphs/gSessionTimesChart.h"
#include "Graphs/gYAxis.h"
#include "Graphs/gFlagsLine.h"
#include "SleepLib/profiles.h"
#include "overview.h"

extern MainWindow *mainwin;

#include <QApplication>

MyLabel::MyLabel(QWidget * parent)
    : QWidget(parent) {
    m_font = QApplication::font();
    time.start();
}
MyLabel::~MyLabel()
{
}
void MyLabel::setText(QString text) {
    m_text = text;
    update();
}
void MyLabel::setFont(QFont & font)
{
    m_font=font;
}
void MyLabel::doRedraw()
{
    update();
}

void MyLabel::setAlignment(Qt::Alignment alignment) {
    m_alignment = alignment;
    doRedraw();
}


void MyLabel::paintEvent(QPaintEvent * /*event*/)
{
    QPainter painter(this);
    painter.setFont(m_font);
    painter.drawText(rect(), m_alignment, m_text);
}

gToolTip::gToolTip(gGraphView *graphview)
    : m_graphview(graphview)
{

    m_pos.setX(0);
    m_pos.setY(0);
    m_visible = false;
    m_alignment = TT_AlignCenter;
    m_spacer = 8; // pixels around text area
    timer = new QTimer(graphview);
    connect(timer, SIGNAL(timeout()), SLOT(timerDone()));
}

gToolTip::~gToolTip()
{
    disconnect(timer, 0, 0, 0);
    delete timer;
}
//void gToolTip::calcSize(QString text,int &w, int &h)
//{
/*GetTextExtent(text,w,h);
w+=m_spacer*2;
h+=m_spacer*2; */
//}

void gToolTip::display(QString text, int x, int y, ToolTipAlignment align, int timeout)
{
    if (timeout <= 0) {
        timeout = AppSetting->tooltipTimeout();
    }
    m_alignment = align;

    m_text = text;
    m_visible = true;
    // TODO: split multiline here
    //calcSize(m_text,tw,th);

    m_pos.setX(x);
    m_pos.setY(y);

    //tw+=m_spacer*2;
    //th+=m_spacer*2;
    //th*=2;
    if (timer->isActive()) {
        timer->stop();
    }
    timer->setSingleShot(true);
    timer->start(timeout);
}

void gToolTip::cancel()
{
    m_visible = false;
    timer->stop();
}

QRect gToolTip::calculateRect(QPainter &painter) 
{
    int x = m_pos.x();
    int y = m_pos.y();

    QRect rect(x, y, 0, 0);

    painter.setFont(*m_font);
    rect = painter.boundingRect(rect, Qt::AlignCenter, m_text);

    int w = rect.width() + m_spacer * 2;
    int xx = rect.x() - m_spacer;

    if (xx < 0) { xx = 0; }

    rect.setLeft(xx);
    rect.setTop(rect.y() - 15);
    rect.setWidth(w);

    int z = rect.x() + rect.width();

    if (z > m_graphview->width() - 10) {
        rect.setLeft(m_graphview->width() - 2 - rect.width());
        rect.setRight(m_graphview->width() - 2);
    }

    int h = rect.height();

    if (rect.y() < 0) {
        rect.setY(0);
        rect.setHeight(h);
    }

    if (m_alignment == TT_AlignRight) {
        rect.moveTopRight(m_pos);
        if ((x-w) < 0) {
            rect.moveLeft(0);
        }
    } else if (m_alignment == TT_AlignLeft) {
        rect.moveTopLeft(m_pos);
    }

    int bot = rect.bottom() - m_graphview->height();
    if (bot > 0) {
        rect.setTop(rect.top()-bot);
        rect.setBottom(m_graphview->height());
    }
    return rect;
}

void gToolTip::paint(QPainter &painter)     //actually paints it.
{
    if (!m_visible) { return; }
    QRect a_rect=calculateRect(painter);

    QBrush brush(QColor(255, 255, 128, 230));
    brush.setStyle(Qt::SolidPattern);
    painter.setBrush(brush);
    painter.setPen(QColor(0, 0, 0, 255));

    painter.drawRoundedRect(a_rect, 5, 5);
    painter.setBrush(Qt::black);

    painter.setFont(*m_font);

    painter.drawText(a_rect, Qt::AlignCenter, m_text);
}

void gToolTip::timerDone()
{
    m_visible = false;
    m_graphview->redraw();
    m_graphview->resetMouse();
}

/* Parent tool tip
   Allow the parent (overview or daily) to add tooltip or short messages to the user.
   The basic problem is that the parent does not know the current dimensions of the graph view.
   the parent does have knowledge of the location of fixed widgets which makes it possible to
   locate tool tips in an appropiate location.
*/
gParentToolTip::gParentToolTip(gGraphView *graphview)
        : gToolTip(graphview) {
        m_parent_visible=false;
}

gParentToolTip::~gParentToolTip() {
}

void gParentToolTip::display(gGraphView* gv,QString text, int verticalOffset, int alignOffset, ToolTipAlignment align , int timeout ,QFont *font ) {
    m_text=text;
    m_verticalOffset=verticalOffset;
    m_alignOffset=alignOffset;
    m_alignment=align;
    m_timeout=timeout;
    m_font=font;
    m_parent_visible=true;
    gv->timedRedraw(0);
};


QRect gParentToolTip::calculateRect(QPainter&  painter ) {
    QRect rect(0, 0, 0, 0);
    painter.setFont(*m_font);
    rect = painter.boundingRect(rect, m_alignment, m_text);

    // update space arround text
    int space=2*m_spacer;
    rect.setHeight(space+rect.height());
    rect.setWidth(space+rect.width());

    rect.moveTo(m_alignOffset,m_height-(m_verticalOffset+rect.height()));

    // move rect accounding to alignment. default is left.

    if (m_alignment == TT_AlignRight) {
        // move rect left by width of rect. if <0 use 0;
        rect.moveLeft(rect.left()-rect.width());
    } else if (m_alignment == TT_AlignCenter) {
        //  left by 1/2 width of rect. if < 0 then use 0
        rect.moveLeft(rect.left()-rect.width()/2);
    }

    if (rect.top()<0) {rect.setTop(0);};
    if (rect.left()<0) {rect.setLeft(0);};

    return rect;
}

void gParentToolTip::paint(QPainter &painter,int width,int height) {
    if (!m_parent_visible) {return ;};
    m_width=width;
    m_height=height;
    gToolTip::display(m_text, 0, 0,m_alignment, m_timeout);
    gToolTip::paint(painter);
};

void gParentToolTip::timerDone() {
    gToolTip::timerDone();
    if (m_parent_visible) {
        m_graphview->timedRedraw(0);
    }
    m_parent_visible=false;
};

void gParentToolTip::cancel() {
    gToolTip::cancel();
    m_parent_visible=false;
};

bool gParentToolTip::visible() {
    return gToolTip::visible() && m_parent_visible;
};




#ifdef ENABLE_THREADED_DRAWING

gThread::gThread(gGraphView *g)
{
    graphview = g;
    mutex.lock();
}
gThread::~gThread()
{
    if (isRunning()) {
        m_running = false;
        mutex.unlock();
        wait();
        terminate();
    }
}

void gThread::run()
{
    m_running = true;
    gGraph *g;

    while (m_running) {
        mutex.lock();

        //mutex.unlock();
        if (!m_running) { break; }

        do {
            g = graphview->popGraph();

            if (g) {
                g->paint(QRegion(g->m_lastbounds));
                //int i=0;
            } else {
                //mutex.lock();
                graphview->masterlock->release(1); // This thread gives up for now..

            }
        } while (g);
    }
}

#endif // ENABLE_THREADED_DRAWING

void gGraphView::queGraph(gGraph *g, int left, int top, int width, int height)
{
    g->m_rect = QRect(left, top, width, height);
#ifdef ENABLED_THREADED_DRAWING
    dl_mutex.lock();
#endif
    m_drawlist.push_back(g);
#ifdef ENABLED_THREADED_DRAWING
    dl_mutex.unlock();
#endif
}

void gGraphView::trashGraphs(bool destroy)
{
    if (destroy) {
        for (auto & graph : m_graphs) {
            delete graph;
        }
    }
    // Don't actually want to delete them here.. we are just borrowing the graphs
    m_graphs.clear();
    m_graphsbyname.clear();
}

// Take the next graph to render from the drawing list
gGraph *gGraphView::popGraph()
{
    gGraph *g;
#ifdef ENABLED_THREADED_DRAWING
    dl_mutex.lock();
#endif

    if (!m_drawlist.isEmpty()) {
        g = m_drawlist.at(0);
        m_drawlist.pop_front();
    } else { g = nullptr; }

#ifdef ENABLED_THREADED_DRAWING
    dl_mutex.unlock();
#endif
    return g;
}

gGraphView::gGraphView(QWidget *parent, gGraphView *shared, QWidget *caller)
#ifdef BROKEN_OPENGL_BUILD
    : QWidget(parent),
#elif QT_VERSION < QT_VERSION_CHECK(5,4,0)
    : QGLWidget(QGLFormat(QGL::DoubleBuffer | QGL::DirectRendering | QGL::HasOverlay | QGL::Rgba),parent,shared),
#else
    :QOpenGLWidget(parent),
#endif
      m_offsetY(0), m_offsetX(0), m_scaleY(0.0), m_scrollbar(nullptr)
{
    this->caller = caller;

//    this->grabGesture(Qt::SwipeGesture);
//    this->grabGesture(Qt::PanGesture);
//    this->grabGesture(Qt::TapGesture);
//    this->grabGesture(Qt::TapAndHoldGesture);
//    this->grabGesture(Qt::CustomGesture);
    this->grabGesture(Qt::PinchGesture);
    this->setAttribute(Qt::WA_AcceptTouchEvents);
//    this->setAttribute(Qt::WA_TouchPadAcceptSingleTouchEvents);

    m_shared = shared;
    m_sizer_index = m_graph_index = 0;
    m_metaselect = m_button_down = m_graph_dragging = m_sizer_dragging = false;
    m_lastypos = m_lastxpos = 0;
    m_horiz_travel = 0;
    m_minx = m_maxx = 0;
    m_day = nullptr;
    m_selected_graph = nullptr;
    m_scrollbar = nullptr;
    m_point_released = m_point_clicked = QPoint(0,0);
    m_showAuthorMessage = true;

    horizScrollTime.start();
    vertScrollTime.start();

    this->setMouseTracking(true);
    m_emptytext = STR_Empty_NoData;
    m_emptyimage = QPixmap(":/icons/logo-md.png");
    InitGraphGlobals(); // FIXME: sstangl: handle error return.
#ifdef ENABLE_THREADED_DRAWING
    m_idealthreads = QThread::idealThreadCount();

    if (m_idealthreads <= 0) { m_idealthreads = 1; }

    masterlock = new QSemaphore(m_idealthreads);
#endif
    m_tooltip = new gToolTip(this);
    m_parent_tooltip = new gParentToolTip(this);
    /*for (int i=0;i<m_idealthreads;i++) {
        gThread * gt=new gThread(this);
        m_threads.push_back(gt);
        //gt->start();
    }*/

    setFocusPolicy(Qt::StrongFocus);
    m_showsplitter = true;
    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), SLOT(refreshTimeout()));
    print_scaleY = print_scaleX = 1.0;

    redrawtimer = new QTimer(this);
    connect(redrawtimer, SIGNAL(timeout()), SLOT(redraw()));

    m_fadingOut = false;
    m_fadingIn = false;
    m_inAnimation = false;
    m_limbo = false;
    m_fadedir = false;
    m_blockUpdates = false;
    use_pixmap_cache = AppSetting->usePixmapCaching();

    pin_graph = nullptr;
    popout_graph = nullptr;
   // pixmapcache.setCacheLimit(10240*2);

    m_dpr = devicePixelRatio();
    m_dpr = 1; // meh???

#ifndef BROKEN_OPENGL_BUILD
    setAutoFillBackground(false);
#if QT_VERSION < QT_VERSION_CHECK(5,4,0)
    // happens no matter what in 5.4+
    setAutoBufferSwap(false);
#endif
#endif

    context_menu = new QMenu(this);
    pin_action = context_menu->addAction(QString(), this, SLOT(togglePin()));
    pin_icon = QPixmap(":/icons/pushpin.png");

    popout_action = context_menu->addAction(QObject::tr("Pop out Graph"), this, SLOT(popoutGraph()));

    snap_action = context_menu->addAction(QString(), this, SLOT(onSnapshotGraphToggle()));
    context_menu->addSeparator();

    zoom100_action = context_menu->addAction(tr("100% zoom level"), this, SLOT(resetZoom()));
    if (caller)
        zoom100_action->setToolTip(tr("Restore X-axis zoom to 100% to view entire selected period."));
    else
        zoom100_action->setToolTip(tr("Restore X-axis zoom to 100% to view entire day's data."));

    QAction * action = context_menu->addAction(tr("Reset Graph Layout"), this, SLOT(resetLayout()));
    action->setToolTip(tr("Resets all graphs to a uniform height and default order."));

    context_menu->addSeparator();
    limits_menu = context_menu->addMenu(tr("Y-Axis"));
    plots_menu = context_menu->addMenu(tr("Plots"));
    connect(plots_menu, SIGNAL(triggered(QAction*)), this, SLOT(onPlotsClicked(QAction*)));

//    overlay_menu = context_menu->addMenu("Overlays");

    cpap_menu = context_menu->addMenu(tr("CPAP Overlays"));
    connect(cpap_menu, SIGNAL(triggered(QAction*)), this, SLOT(onOverlaysClicked(QAction*)));

    oximeter_menu = context_menu->addMenu(tr("Oximeter Overlays"));
    connect(oximeter_menu, SIGNAL(triggered(QAction*)), this, SLOT(onOverlaysClicked(QAction*)));

    lines_menu = context_menu->addMenu(tr("Dotted Lines"));
    connect(lines_menu, SIGNAL(triggered(QAction*)), this, SLOT(onLinesClicked(QAction*)));


#if !defined(Q_OS_MAC)
    context_menu->setStyleSheet("QMenu {\
                              background-color: #f0f0f0; /* sets background of the menu */\
                              border: 1px solid black;\
                          }\
                          QMenu::item {\
                              /* sets background of menu item. set this to something non-transparent\
                                  if you want menu color and menu item color to be different */\
                              background-color: #f0f0f0;\
                          }\
                          QMenu::item:selected { /* when user selects item using mouse or keyboard */\
                              background-color: #ABCDEF;\
                          }");

#else
    context_menu->setStyleSheet("QMenu::item:selected { /* when user selects item using mouse or keyboard */\
                                    background-color: #ABCDEF;\
                                }");
#endif
}

void MyDockWindow::closeEvent(QCloseEvent *event)
{
    gGraphView::dock->deleteLater();
    gGraphView::dock=nullptr;
    QMainWindow::closeEvent(event);
}

MyDockWindow * gGraphView::dock = nullptr;
void gGraphView::popoutGraph()
{
    QScreen *screen = QGuiApplication::primaryScreen();
    QRect  screenGeometry = screen->availableGeometry();
    int screenHeight = screenGeometry.height();

    if (popout_graph) {
        // Create new dock if we don't have one already
        if (dock == nullptr) {
            dock = new MyDockWindow(mainwin->getDaily(), Qt::Window);
            dock->resize(width(),0);
         //   QScrollArea
        }
        //////// Create dock widget and resize dock to hold new widget
        QDockWidget * newDockWidget = new QDockWidget(dock);
        newDockWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        newDockWidget->setMouseTracking(true);
        int titleBarHeight = 30;
        int newDockHeight = dock->height()+popout_graph->height()+titleBarHeight/*+2*/; // +2 for group box border
        qDebug() << "widget geometry" << newDockWidget->frameGeometry() << "title bar height" << titleBarHeight;
        if (newDockHeight > screenHeight) {
            QMessageBox::warning(nullptr, STR_MessageBox_Warning,
            QObject::tr("The popout window is full. You should capture the existing\npopout window, delete it, then pop out this graph again."));
            return;
        }
        qDebug() << "dock height" << dock->height() << "popout graph height" << popout_graph->height();
        dock->resize(dock->width(), newDockHeight);
        newDockWidget->setMinimumHeight(popout_graph->height()+titleBarHeight);
        newDockWidget->resize(width(), popout_graph->height()+titleBarHeight);
        qDebug() << "dock height resized to" << dock->height() << "widget resized to" << newDockWidget->height();
        //////// End resize dock to hold new widget

        gGraphView * gv = new gGraphView(newDockWidget, this);
        newDockWidget->setWidget(gv);
        gv->setMouseTracking(true);
        gv->setDay(this->day());
        dock->addDockWidget(Qt::BottomDockWidgetArea, newDockWidget, Qt::Vertical);

        /////// Fix some resize glitches ///////
        /********* Is this still needed?  -- gts 8/1/2020
        QDockWidget* dummy = new QDockWidget;
        dock->addDockWidget(Qt::BottomDockWidgetArea, dummy);
        dock->removeDockWidget(dummy);

        QPoint mousePos = dock->mapFromGlobal(QCursor::pos());
        mousePos.setY(dock->rect().bottom()+2);
        QCursor::setPos(dock->mapToGlobal(mousePos));
        QMouseEvent* grabSeparatorEvent =
            new QMouseEvent(QMouseEvent::MouseButtonPress,mousePos,Qt::LeftButton,Qt::LeftButton,Qt::NoModifier);
        qApp->postEvent(dock, grabSeparatorEvent);
        *************/
        /////////////////////////////////////////

//        dock->updateGeometry();
        if (!dock->isVisible()) dock->show();

        gGraph * graph = popout_graph;

        /////////////////////
        // Construct name for this popout graph
        QString basename = graph->title()+" - ";
        if (graph->m_day) {
            // append the date of the graph's left edge to the snapshot name
            // so the user knows what day the snapshot starts
            // because the name is displayed to the user, use local time
            QDateTime date = QDateTime::fromMSecsSinceEpoch(graph->min_x, Qt::LocalTime);
            basename += date.date().toString(Qt::SystemLocaleLongDate);
        }
        QString newname = basename;
        // Find a new name.. How many snapshots for each graph counts as stupid?
        QString newtitle = graph->title();
        newDockWidget->setWindowTitle(newname);
        // end name construction and setting title
        /////////////////////

        qDebug() << "original graph height is" << graph->height();
        gGraph * newgraph = new gGraph(newname, nullptr, newtitle, graph->units(), graph->height(), graph->group());
        newgraph->setHeight(graph->height());

        short group = 0;
        gv->m_graphs.insert(m_graphs.indexOf(graph)+1, newgraph);
        gv->m_graphsbyname[newname] = newgraph;
        newgraph->m_graphview = gv;

        for (auto & l : graph->m_layers) {
            Layer * layer = l->Clone();
            if (layer) {
                newgraph->m_layers.append(layer);
            }
        }

        for (auto & g : m_graphs) {
            group = qMax(g->group(), group);
        }
        newgraph->setGroup(group+1);
        //newgraph->setMinHeight(pm.height());

        newgraph->setDay(graph->m_day);
        if (graph->m_day) {
            graph->m_day->incUseCounter();
        }
        newgraph->min_x = graph->min_x;
        newgraph->max_x = graph->max_x;

        newgraph->setBlockSelect(false);
        newgraph->setZoomY(graph->zoomY());

        newgraph->setSnapshot(false);
        newgraph->setShowTitle(true);

        qDebug() << "newgraph height" << newgraph->height() << "gv height" << gv->height();

        gv->timedRedraw(0);
        // Force dock to redraw (and return focus to OSCAR)
        dock->activateWindow();
        dock->raise();
        this->activateWindow();
        this->raise();
    }
}

void gGraphView::togglePin()
{
    if (pin_graph) {
        pin_graph->setPinned(!pin_graph->isPinned());
        timedRedraw(0);
    }
}

void gGraphView::closeEvent(QCloseEvent * event)
{

    timer->stop();
    redrawtimer->stop();
    disconnect(redrawtimer, 0, 0, 0);
    disconnect(timer, 0, 0, 0);
    timer->deleteLater();
    redrawtimer->deleteLater();
    pixmapcache.clear();
    if (m_scrollbar) {
        this->disconnect(m_scrollbar, SIGNAL(sliderMoved(int)), 0, 0);
    }
#ifdef BROKEN_OPENGL_BUILD
    QWidget::closeEvent(event);
#elif QT_VERSION < QT_VERSION_CHECK(5,4,0)
    QGLWidget::closeEvent(event);
#else
    QOpenGLWidget::closeEvent(event);
#endif
}

gGraphView::~gGraphView()
{
#ifndef BROKEN_OPENGL_BUILD
    doneCurrent();
#endif

#ifdef ENABLE_THREADED_DRAWING

    for (int i=0; i < m_threads.size(); i++) {
        delete m_threads[i];
    }

    delete masterlock;
#endif

    // Note: This will cause a crash if two graphs accidentally have the same name
    for (auto & graph : m_graphs) {
        delete graph;
    }

    delete m_tooltip;
    delete m_parent_tooltip;
    m_graphs.clear();
}

bool gGraphView::event(QEvent * event)
{
    if (event->type() == QEvent::Gesture) {
        return gestureEvent(static_cast<QGestureEvent *>(event));
    }
    return QWidget::event(event);
}

bool gGraphView::gestureEvent(QGestureEvent * event)
{
    if (QGesture *pinch = event->gesture(Qt::PinchGesture))
        pinchTriggered(static_cast<QPinchGesture *>(pinch));

    return true;
}


bool gGraphView::pinchTriggered(QPinchGesture * gesture)
{
    gGraph * graph = nullptr;
    int group =0;
//    if (!graph) {
        // just pick any graph then
        for (const auto & g : m_graphs) {
            if (!g) continue;
            if (!g->isEmpty()) {
                graph = g;
                group = graph->group();
                break;
            }
        }
//    } else group=graph->group();

    if (!graph) { return true; }

    Q_UNUSED(group)

//  qDebug() << gesture << gesture->scaleFactor();
    if (gesture->state() == Qt::GestureStarted) {
        pinch_min = m_minx;
        pinch_max = m_maxx;
    }

     int origin_px = gesture->centerPoint().x() - titleWidth;

     // could use this instead, and have it more dynamic
     // graph->ZoomX(gesture->scaleFactor(), x);

     static const double zoom_hard_limit = 500.0;

     qint64 min = pinch_min;
     qint64 max = pinch_max;

     int width = graph->m_rect.width() - graph->left - graph->right;

     double hardspan = graph->rmax_x - graph->rmin_x;
     double span = max - min;
     double ww = double(origin_px) / double(width);
     double origin = ww * span;

     double q = span / gesture->totalScaleFactor();

     if (q > hardspan) { q = hardspan; }

     if (q < hardspan / zoom_hard_limit) { q = hardspan / zoom_hard_limit; }

     min = min + origin - (q * ww);
     max = min + q;

     if (min < graph->rmin_x) {
         min = graph->rmin_x;
         max = min + q;
     }

     if (max > graph->rmax_x) {
         max = graph->rmax_x;
         min = max - q;
     }

     //extern const int max_history;

     SetXBounds(min, max, graph->m_group);
    return true;
}


void gGraphView::dumpInfo()
{
    QDate date = mainwin->getDaily()->getDate();
    QString text = "==================== CPAP Information Dump ====================";
    mainwin->log(text);

    Day * day = p_profile->GetGoodDay(date, MT_CPAP);
    if (day) {
        QDateTime dt=QDateTime::fromMSecsSinceEpoch(day->first(), Qt::LocalTime);

        mainwin->log(QString("Available Channels for %1").arg(dt.toString("MMM dd yyyy")));
        QHash<schema::ChanType, QList<schema::Channel *> > list;

        for (const auto & sess : day->sessions) {
            for (auto it=sess->eventlist.begin(), end=sess->eventlist.end(); it != end; ++it) {
                ChannelID code = it.key();
                schema::Channel * chan = &schema::channel[code];
                list[chan->type()].append(chan);
            }
        }

        QHash<schema::ChanType, QList<schema::Channel *> >::iterator lit;
        for (auto lit = list.begin(), end=list.end(); lit != end; ++lit) {
            switch (lit.key()) {
            case schema::DATA:
                text = "DATA: ";
                break;
            case schema::SETTING:
                text = "SETTING: ";
                break;
            case schema::FLAG:
                text = "FLAG: ";
                break;
            case schema::MINOR_FLAG:
                text = "MINOR_FLAG: ";
                break;
            case schema::SPAN:
                text = "SPAN: ";
                break;
            case schema::WAVEFORM:
                text = "WAVEFORM: ";
                break;
            case schema::UNKNOWN:
                text = "UNKNOWN: ";
                break;
            default:
                break;
            }
            QStringList str;
            for (const auto & chan : lit.value()) {
                str.append(chan->code());
            }
            str.sort();
            text.append(str.join(", "));
            mainwin->log(text);
        }
    }
//    for (int i=0;i<m_graphs.size();i++) {
//        m_graphs[i]->dumpInfo();
//    }
}

// Render graphs with QPainter or pixmap caching, depending on preferences
void gGraphView::DrawTextQue(QPainter &painter)
{
    // process the text drawing queue
    int h,w;

    strings_drawn_this_frame += m_textque.size() + m_textqueRect.size();;

    for (const TextQue & q : m_textque) {
        // can do antialiased text via texture cache fine on mac
        // Just draw the fonts..
        painter.setPen(QColor(q.color));
        painter.setFont(*q.font);

        if (q.angle == 0) {
            painter.drawText(q.x, q.y, q.text);
        } else {
            w = painter.fontMetrics().width(q.text);
            h = painter.fontMetrics().xHeight() + 2;

            painter.translate(q.x, q.y);
            painter.rotate(-q.angle);
            painter.drawText(floor(-w / 2.0)-6, floor(-h / 2.0), q.text);
            painter.rotate(+q.angle);
            painter.translate(-q.x, -q.y);
        }
    }
    m_textque.clear();

    ////////////////////////////////////////////////////////////////////////
    // Text Rectangle Queues..
    ////////////////////////////////////////////////////////////////////////

    for (const TextQueRect & q : m_textqueRect) {
        // Just draw the fonts..

        painter.setPen(QColor(q.color));
        painter.setFont(*q.font);

        if (q.angle == 0) {
            painter.drawText(q.rect, q.flags, q.text);
        } else {
            w = painter.fontMetrics().width(q.text);
            h = painter.fontMetrics().xHeight() + 2;

            painter.translate(q.rect.x(), q.rect.y());
            painter.rotate(-q.angle);
            painter.drawText(floor(-w / 2.0), floor(-h / 2.0), q.text);
            painter.rotate(+q.angle);
            painter.translate(-q.rect.x(), -q.rect.y());
        }

    }
    m_textqueRect.clear();
}


const QString z__cacheStr = "%1:%2:%3";

void gGraphView::DrawTextQueCached(QPainter &painter)
{
    // process the text drawing queue
    int h,w;
    QString hstr;
    QPixmap pm;
    float xxx, yyy;
    const int buf = 8;
    int fonta = defaultfont->pointSize();
    int fontb = mediumfont->pointSize();
    int fontc = bigfont->pointSize();
    int size;


    for (const TextQue & q : m_textque) {
        // can do antialiased text via texture cache fine on mac
        // Generate the pixmap cache "key"
        size = (q.font == defaultfont) ? fonta : (q.font==mediumfont) ? fontb : (q.font == bigfont) ? fontc : q.font->pointSize();

        hstr = z__cacheStr.arg(q.text).arg(q.color.name()).arg(size);

        if (!QPixmapCache::find(hstr, &pm)) {

            QFontMetrics fm(*q.font);
            w = fm.width(q.text);
            h = fm.height()+buf;

            pm = QPixmap(w, h);
            pm.fill(Qt::transparent);

            QPainter imgpainter(&pm);

            imgpainter.setPen(q.color);
            imgpainter.setFont(*q.font);

            imgpainter.setRenderHint(QPainter::TextAntialiasing, q.antialias);
            imgpainter.drawText(0, h-buf, q.text);
            imgpainter.end();

            QPixmapCache::insert(hstr, pm);
        }

        h = pm.height();
        w = pm.width();
        if (q.angle != 0) {
            xxx = q.x - h - (h / 2);
            yyy = q.y + w / 2;

            xxx += 4;
            yyy += 4;

            painter.translate(xxx, yyy);
            painter.rotate(-q.angle);
            painter.drawPixmap(QRect(0, h / 2, w, h), pm);
            painter.rotate(+q.angle);
            painter.translate(-xxx, -yyy);
        } else {
            QRect r1(q.x - buf / 2 + 4, q.y - h + buf, w, h);
            painter.drawPixmap(r1, pm);
        }
    }
    ////////////////////////////////////////////////////////////////////////
    // Text Rectangle Queues..
    ////////////////////////////////////////////////////////////////////////

    for (const TextQueRect & q : m_textqueRect) {
        // can do antialiased text via texture cache fine on mac
        // Generate the pixmap cache "key"

        size = (q.font == defaultfont) ? fonta : (q.font==mediumfont) ? fontb : (q.font == bigfont) ? fontc : q.font->pointSize();

        hstr = z__cacheStr.arg(q.text).arg(q.color.name()).arg(size);

        if (!QPixmapCache::find(hstr, &pm)) {

            w = q.rect.width();
            h = q.rect.height();

            pm = QPixmap(w, h);

            pm.fill(Qt::transparent);

            QPainter imgpainter(&pm);

            imgpainter.setPen(q.color);
            imgpainter.setFont(*q.font);
            imgpainter.setRenderHint(QPainter::TextAntialiasing, true);
            imgpainter.drawText(QRect(0,0, w, h), q.flags, q.text);
            imgpainter.end();

            QPixmapCache::insert(hstr, pm);
        } else {
            h = pm.height();
            w = pm.width();
        }
        if (q.angle != 0) {
            xxx = q.rect.x() - h - (h / 2);
            yyy = q.rect.y() + w / 2;

            xxx += 4;
            yyy += 4;

            painter.translate(xxx, yyy);
            painter.rotate(-q.angle);
            painter.drawPixmap(QRect(0, h / 2, w, h), pm);
            painter.rotate(+q.angle);
            painter.translate(-xxx, -yyy);
        } else {
            painter.drawPixmap(q.rect,pm, QRect(0,0,w,h));
        }
    }

    strings_drawn_this_frame += m_textque.size() + m_textqueRect.size();;
    m_textque.clear();
    m_textqueRect.clear();
}

void gGraphView::AddTextQue(const QString &text, QRectF rect, quint32 flags, float angle, QColor color, QFont *font, bool antialias)
{
#ifdef ENABLED_THREADED_DRAWING
    text_mutex.lock();
#endif
    m_textqueRect.append(TextQueRect(rect,flags,text,angle,color,font,antialias));
#ifdef ENABLED_THREADED_DRAWING
    text_mutex.unlock();
#endif
}

void gGraphView::AddTextQue(const QString &text, short x, short y, float angle, QColor color, QFont *font, bool antialias)
{
#ifdef ENABLED_THREADED_DRAWING
    text_mutex.lock();
#endif
    m_textque.append(TextQue(x,y,angle,text,color,font,antialias));
#ifdef ENABLED_THREADED_DRAWING
    text_mutex.unlock();
#endif
}

void gGraphView::addGraph(gGraph *g, short group)
{
    if (!g) {
        qDebug() << "Attempted to add an empty graph!";
        return;
    }

    if (!m_graphs.contains(g)) {
        g->setGroup(group);
        m_graphs.push_back(g);

        if (!m_graphsbyname.contains(g->name())) {
            m_graphsbyname[g->name()] = g;
        } else {
            qDebug() << "Can't have two graphs with the same code string in the same GraphView!!";
        }

        // updateScrollBar();
    }
}

// Calculate total height of all graphs including spacers
float gGraphView::totalHeight()
{
    float th = 0;

    for (const auto & g : m_graphs) {
        if (g->isEmpty() || (!g->visible())) { continue; }

        th += g->height() + graphSpacer;
    }

    return ceil(th);
}

float gGraphView::findTop(gGraph *graph)
{
    float th = -m_offsetY;

    for (const auto & g : m_graphs) {
        if (g == graph) { break; }

        if (g->isEmpty() || (!g->visible())) { continue; }

        th += g->height() * m_scaleY + graphSpacer;
    }

    return ceil(th);
}

float gGraphView::scaleHeight()
{
    float th = 0;

    for (const auto & graph : m_graphs) {
        if (graph->isEmpty() || (!graph->visible())) { continue; }

        th += graph->height() * m_scaleY + graphSpacer;
    }

    return ceil(th);
}

void gGraphView::updateScale()
{
    if (!isVisible()) {
        m_scaleY = 0.0;
        return;
    }

    float th = totalHeight(); // height of all graphs
    float h = height();     // height of main widget


    if (th < h) {
        th -= graphSpacer;
    //    th -= visibleGraphs() * graphSpacer;   // compensate for spacer height
        m_scaleY = h / th;  // less graphs than fits on screen, so scale to fit
    } else {
        m_scaleY = 1.0;
    }

    updateScrollBar();
}


void gGraphView::resizeEvent(QResizeEvent *e)
{
#if (QT_VERSION >= QT_VERSION_CHECK(5,4,0)) && !defined(BROKEN_OPENGL_BUILD)
    // This ques a needed redraw event..
    QOpenGLWidget::resizeEvent(e);
#endif

    updateScale();

    if (m_scaleY > 0.0001) {
        for (auto & graph : m_graphs) {
            graph->resize(e->size().width(), graph->height() * m_scaleY);
        }
    }
    e->accept();
}

void gGraphView::scrollbarValueChanged(int val)
{
    //qDebug() << "Scrollbar Changed" << val;
    if (m_offsetY != val) {
        m_offsetY = val;
#if QT_VERSION >= QT_VERSION_CHECK(5,4,0)
        update();
#else
        timedRedraw(); // do this on a timer?
#endif
    }
}

void gGraphView::GetRXBounds(qint64 &st, qint64 &et)
{
    for (const auto & graph : m_graphs) {
        if (graph->group() == 0) {
            st = graph->rmin_x;
            et = graph->rmax_x;
            break;
        }
    }
}

void gGraphView::resetZoom() {
    Overview *overvw = qobject_cast<Overview*>(caller);
    if (overvw) {
        overvw->on_zoomButton_clicked();
        return;
    }

    ResetBounds(true);
}

void gGraphView::ResetBounds(bool refresh) //short group)
{
    if (m_graphs.size() == 0) return;
    Q_UNUSED(refresh)
    qint64 m1 = 0, m2 = 0;
    gGraph *graph = nullptr;

    for (auto & g : m_graphs) {
        g->ResetBounds();

        if (!g->min_x) { continue; }

        graph = g;

        if (!m1 || g->min_x < m1) { m1 = g->min_x; }

        if (!m2 || g->max_x > m2) { m2 = g->max_x; }
    }

//    if (p_profile->general->linkGroups()) {
//        for (int i = 0; i < m_graphs.size(); i++) {
//            m_graphs[i]->SetMinX(m1);
//            m_graphs[i]->SetMaxX(m2);
//        }
//    }

    if (!graph) {
        graph = m_graphs[0];
    }

    m_minx = graph->min_x;
    m_maxx = graph->max_x;

    updateScale();
}

void gGraphView::GetXBounds(qint64 &st, qint64 &et)
{
    st = m_minx;
    et = m_maxx;
}

// Supplies time range to all graph objects in linked group, refreshing if requested
void gGraphView::SetXBounds(qint64 minx, qint64 maxx, short group, bool refresh)
{
    bool changed= (minx!=m_minx)||(maxx!=m_maxx);

    for (auto & graph : m_graphs) {
        if ((graph->group() == group)) {
            graph->SetXBounds(minx, maxx);
        }
    }

    m_minx = minx;  // left and right edges of graph, in msec in epoch
    m_maxx = maxx;

    if (refresh) { timedRedraw(0); }
    if (changed) emit XBoundsChanged(minx ,maxx);
}

void gGraphView::updateScrollBar()
{
    if (!m_scrollbar || (m_graphs.size() == 0)) {
        return;
    }

    float th = scaleHeight(); // height of all graphs
    float h = height();     // height of main widget

    float vis = 0;

    for (const auto & graph : m_graphs) {
        vis += (graph->isEmpty() || !graph->visible()) ? 0 : 1;
    }

    if (th < h) { // less graphs than fits on screen

        m_scrollbar->setMaximum(0); // turn scrollbar off.

    } else {  // more graphs than fit on screen
        //m_scaleY=1.0;
        float avgheight = th / vis;
        m_scrollbar->setPageStep(avgheight);
        m_scrollbar->setSingleStep(avgheight / 8.0);
        m_scrollbar->setMaximum(th - height());

        if (m_offsetY > th - height()) {
            m_offsetY = th - height();
        }
    }
}

void gGraphView::setScrollBar(MyScrollBar *sb)
{
    m_scrollbar = sb;
    m_scrollbar->setMinimum(0);
    updateScrollBar();
    this->connect(m_scrollbar, SIGNAL(valueChanged(int)), SLOT(scrollbarValueChanged(int)));
}

bool gGraphView::renderGraphs(QPainter &painter)
{
    float px = m_offsetX;
    float py = -m_offsetY;
    int numgraphs = 0;
    float h, w;
    //ax=px;//-m_offsetX;

    //bool threaded;

    // Tempory hack using this pref..
    //#ifdef ENABLED_THREADED_DRAWING
    /*if (profile->session->multithreading()) { // && (m_idealthreads>1)) {
        threaded=true;
        for (int i=0;i<m_idealthreads;i++) {
            if (!m_threads[i]->isRunning())
                m_threads[i]->start();
        }
    } else threaded=false; */
    //#endif
    //threaded=false;
    if (height() < 40) return false;

    if (m_scaleY < 0.0000001) {
        updateScale();
    }

    lines_drawn_this_frame = 0;
    quads_drawn_this_frame = 0;

    // Calculate the height of pinned graphs

    float pinned_height = 0; // pixel height total
    int pinned_graphs = 0; // count

    for (auto & g : m_graphs) {
        int minh = g->minHeight();
        if (g->height() < minh) {
            g->setHeight(minh);
        }
        if (g->isEmpty()) { continue; }

        if (!g->visible()) { continue; }

        if (!g->isPinned()) { continue; }

        h = g->height() * m_scaleY;
        pinned_height += h + graphSpacer;
        pinned_graphs++;
    }

    py += pinned_height; // start drawing at the end of pinned space

    // Draw non pinned graphs
    for (auto & g : m_graphs) {
        if (g->isEmpty()) { continue; }

        if (!g->visible()) { continue; }

        if (g->isPinned()) { continue; }

        numgraphs++;
        h = g->height() * m_scaleY;

        // set clipping?

        if (py > height()) {
            break;    // we are done.. can't draw anymore
        }

        if ((py + h + graphSpacer) >= 0) {
            w = width();
            int tw = 0; // (g->showTitle() ? titleWidth : 0);

            queGraph(g, px + tw, py, width() - tw, h);

            if ((m_graphs.size() > 1) && m_showsplitter) {
                // draw the splitter handle

                painter.setPen(QColor(220, 220, 220, 255));
                painter.drawLine(0, py + h, w, py + h);
                painter.setPen(QColor(158,158,158,255));
                painter.drawLine(0, py + h + 1, w, py + h + 1);
                painter.setPen(QColor(240, 240, 240, 255));
                painter.drawLine(0, py + h + 2, w, py + h + 2);

            }

        }

        py = ceil(py + h + graphSpacer);
    }

    // Physically draw the unpinned graphs
    for (const auto & g : m_drawlist) {
        g->paint(painter, QRegion(g->m_rect));
    }
    m_drawlist.clear();

    if (m_graphs.size() > 1) {
        AppSetting->usePixmapCaching() ? DrawTextQueCached(painter) :DrawTextQue(painter);

        // Draw a gradient behind pinned graphs
        QLinearGradient linearGrad(QPointF(100, 100), QPointF(width() / 2, 100));
        linearGrad.setColorAt(0, QColor(216, 216, 255));
        linearGrad.setColorAt(1, Qt::white);

        painter.fillRect(0, 0, width(), pinned_height, QBrush(linearGrad));
    }

    py = 0; // start drawing at top...

    // Draw Pinned graphs
    for (const auto & g : m_graphs) {
        if (g->isEmpty()) { continue; }

        if (!g->visible()) { continue; }

        if (!g->isPinned()) { continue; }

        h = g->height() * m_scaleY;
        numgraphs++;

        if (py > height()) {
            break;    // we are done.. can't draw anymore
        }

        if ((py + h + graphSpacer) >= 0) {
            w = width();
            int tw = 0; //(g->showTitle() ? titleWidth : 0);

            queGraph(g, px + tw, py, width() - tw, h);

            if ((m_graphs.size() > 1) && m_showsplitter) {
                // draw the splitter handle
                painter.setPen(QColor(220, 220, 220, 255));
                painter.drawLine(0, py + h, w, py + h);
                painter.setPen(QColor(128, 128, 128, 255));
                painter.drawLine(0, py + h + 1, w, py + h + 1);
                painter.setPen(QColor(190, 190, 190, 255));
                painter.drawLine(0, py + h + 2, w, py + h + 2);
            }

        }

        py = ceil(py + h + graphSpacer);
    }

    //int thr=m_idealthreads;
#ifdef ENABLED_THREADED_DRAWING
    if (threaded) {
        for (int i = 0; i < m_idealthreads; i++) {
            masterlock->acquire(1);
            m_threads[i]->mutex.unlock();
        }

        // wait till all the threads are done
        // ask for all the CPU's back..
        masterlock->acquire(m_idealthreads);
        masterlock->release(m_idealthreads);
    } else {
#endif
        for (const auto & g : m_drawlist) {
            g->paint(painter, QRegion(g->m_rect));
        }
        m_drawlist.clear();

#ifdef ENABLED_THREADED_DRAWING
    }
#endif
    //int elapsed=time.elapsed();
    //QColor col=Qt::black;

    //    lines->setSize(linesize);

    AppSetting->usePixmapCaching() ? DrawTextQueCached(painter) :DrawTextQue(painter);
    //glDisable(GL_TEXTURE_2D);
    //glDisable(GL_DEPTH_TEST);

    return numgraphs > 0;
}

#ifdef BROKEN_OPENGL_BUILD
void gGraphView::paintEvent(QPaintEvent *)
#else
void gGraphView::paintGL()
#endif
{

    if (!isVisible()) {
        // wtf is this even getting CALLED??
        return;
    }
#ifdef DEBUG_EFFICIENCY
    QElapsedTimer time;
    time.start();
#endif

    if (redrawtimer->isActive()) {
        redrawtimer->stop();
    }

    bool render_cube = false; //p_profile->appearance->animations(); // do something to

    if (width() <= 0) { return; }
    if (height() <= 0) { return; }


// Create QPainter object, note this is only valid from paintGL events!
    QPainter painter(this);
    painter.setRenderHint(QPainter::HighQualityAntialiasing, true);

    painter.setRenderHint(QPainter::TextAntialiasing, true);

    QRect bgrect(0, 0, width(), height());
    painter.fillRect(bgrect,QBrush(QColor(255,255,255)));

    bool graphs_drawn = true;

    lines_drawn_this_frame = 0;
    quads_drawn_this_frame = 0;
    strings_drawn_this_frame = 0;
    strings_cached_this_frame = 0;

//    qDebug() << "About to call renderGraphs from paintGL()";
//    sleep(3);

    graphs_drawn = renderGraphs(painter);

//
//  Show message to user if no graphs available
//
    if (!graphs_drawn) {
        qDebug() << "gGraphView: No graphs drawn";

        QString txt;
        if (m_showAuthorMessage) {
            if (emptyText() == STR_Empty_Brick) {
                txt = QObject::tr("Your machine doesn't record data to graph in Daily View");
            } else {
                // not proud of telling them their machine is a Brick.. ;)
                txt = QObject::tr("There is no data to graph");
            }
        }
        qDebug() << "gGraphView:" + txt;

/*** This doesn't seem to do anything?
        if (! this->m_emptyimage.isNull()) {
            int x = width()/2 - this->m_emptyimage.width()/2;
            int y = height()/2 - this->m_emptyimage.height()/2;

            QRectF target(QRect(x, y, this->m_emptyimage.width(), this->m_emptyimage.height()));
            QRectF source(QRect(0, 0, this->m_emptyimage.width(), this->m_emptyimage.height()));
        }
***/

        QColor col = Qt::black;
        painter.setPen(col);

        QRectF rec(0,0,width(),0);
        // To put text in center of screen:
//        QRectF rec(0,0,width(),height(0));

        painter.setFont(*mediumfont);
//        rec = painter.boundingRect(rec, Qt::AlignCenter, txt);
        rec = painter.boundingRect(rec, Qt::AlignHCenter | Qt::AlignBottom, txt);
        rec.moveBottom(height()-15);

        painter.drawText(rec, Qt::AlignCenter, txt);
    }

    if (AppSetting->lineCursorMode()) {
       emit updateCurrentTime(graphs_drawn ? m_currenttime : 0.0F);
    } else {
       emit updateRange(graphs_drawn ? m_minx : 0.0F, m_maxx);
    }
    AppSetting->usePixmapCaching() ? DrawTextQueCached(painter) :DrawTextQue(painter);

    m_tooltip->paint(painter);
    m_parent_tooltip->paint(painter,width(), height() );

#ifdef DEBUG_EFFICIENCY
    const int rs = 20;
    static double ring[rs] = {0};
    static int rp = 0;

    // Show FPS and draw time
    if (m_showsplitter && AppSetting->showPerformance()) {
        QString ss;
        qint64 ela = time.nsecsElapsed();
        double ms = double(ela) / 1000000.0;
        ring[rp++] = 1000.0 / ms;
        rp %= rs;
        double v = 0;

        for (int i = 0; i < rs; i++) {
            v += ring[i];
        }

        double fps = v / double(rs);
        ss = "Debug Mode " + QString::number(fps, 'f', 1) + "fps "
                + QString::number(lines_drawn_this_frame, 'f', 0) + " lines "
//                + QString::number(quads_drawn_this_frame, 'f', 0) + " quads "
                + QString::number(strings_drawn_this_frame, 'f', 0) + " strings "
                + QString::number(strings_cached_this_frame, 'f', 0) + " cached ";

        int w, h;
        // this uses tightBoundingRect, which is different on Mac than it is on Windows & Linux.
        GetTextExtent(ss, w, h);
        QColor col = Qt::white;

        if (m_graphs.size() > 0) {
            painter.fillRect(width() - m_graphs[0]->marginRight(), 0, m_graphs[0]->marginRight(), w, QBrush(col));
        }
#ifndef Q_OS_MAC
        //   if (usePixmapCache()) xx+=4; else xx-=3;
#endif
        AddTextQue(ss, width(), w / 2, 90, QColor(Qt::black), defaultfont);
        AppSetting->usePixmapCaching() ? DrawTextQueCached(painter) :DrawTextQue(painter);
    }
//    painter.setPen(Qt::lightGray);
//    painter.drawLine(0, 0, 0, height());
//    painter.drawLine(0, 0, width(), 0);
//    painter.setPen(Qt::darkGray);
    //painter.drawLine(width(), 0, width(), height());

#endif

    painter.end();

//        qDebug() << "Break 4";
//        sleep(3);

#ifndef BROKEN_OPENGL_BUILD
#if QT_VERSION < QT_VERSION_CHECK(5,4,0)
    swapBuffers();
#endif
#endif
    if (this->isVisible() && !graphs_drawn && render_cube) { // keep the cube spinning
        redrawtimer->setInterval(1000.0 / 50); // 50 FPS
        redrawtimer->setSingleShot(true);
        redrawtimer->start();
    }

//        qDebug() << "Break 5";
//        sleep(3);

}

QString gGraphView::getRangeInDaysString()
{
    QDateTime st = QDateTime::fromMSecsSinceEpoch(m_minx);
    QDateTime et = QDateTime::fromMSecsSinceEpoch(m_maxx);

    QDate std = st.date();
    QDate etd = et.date();

    if (std.year() == etd.year())
        return st.toString(" d MMM") + " - " +  et.toString("d MMM yyyy");
    else
        return st.toString(" d MMM yyyy") + " - " +  et.toString("d MMM yyyy");
}

QString gGraphView::getRangeString()
{
    QDateTime st = QDateTime::fromMSecsSinceEpoch(m_minx);
    QDateTime et = QDateTime::fromMSecsSinceEpoch(m_maxx);

    QDate std = st.date();
    QDate etd = et.date();

    // Format if Begin and End are on different days
    if (std != etd) {  // further adjust formatting if on different years
        if (std.year() == etd.year())
            return st.toString(" d MMM [ HH:mm:ss") + " - " +  et.toString("HH:mm:ss ] d MMM yyyy");
        else
            return st.toString(" d MMM yyyy [ HH:mm:ss") + " - " +  et.toString("HH:mm:ss ] d MMM yyyy");
    }

    // Range is within one (local) day
    qint64 diff = m_maxx - m_minx;
    QString fmt;

    if (diff > 60000) {
            fmt = "HH:mm:ss";
        } else {
            fmt = "HH:mm:ss:zzz";
        }
    QString txt = st.toString(QObject::tr("d MMM yyyy [ %1 - %2 ]").arg(fmt).arg(et.toString(fmt))) ;

    return txt;

/***** WTF is this code trying to do?  Replaced by above 8/9/2019
    // a note about time zone usage here
    // even though this string will be displayed to the user
    // the graph is drawn using UTC times, so no conversion
    // is needed to format the date and time for the user
    // i.e. if the graph says the cursor is at 5pm, then that
    // is what we should display.
    // passing in UTC below is necessary to prevent QT
    // from automatically converting the time to local time
    QString fmt;

    qint64 diff = m_maxx - m_minx;

    if (diff > 86400000) {                  // 86400000 is one day, in milliseconds
        int days = ceil(double(m_maxx-m_minx) / 86400000.0);

        qint64 minx = floor(double(m_minx)/86400000.0);
        minx *= 86400000L;

        qint64 maxx = minx + 86400000L * qint64(days)-1;

        QDateTime st = QDateTime::fromMSecsSinceEpoch(minx, Qt::UTC);
        QDateTime et = QDateTime::fromMSecsSinceEpoch(maxx, Qt::UTC);

        QString txt = st.toString("d MMM") + " - " +  et.addDays(-1).toString("d MMM yyyy");
        return txt;
    } else if (diff > 60000) {
        fmt = "HH:mm:ss";
    } else {
        fmt = "HH:mm:ss:zzz";
    }

    QString txt = st.toString(QObject::tr("d MMM [ %1 - %2 ]").arg(fmt).arg(et.toString(fmt))) ;

    return txt;
*/
}

void gGraphView::leaveEvent(QEvent * event)
{
    Q_UNUSED(event);
    if (m_metaselect) {
        m_metaselect = false;
        timedRedraw(0);
    }
    releaseKeyboard();
}


// For manual scrolling
void gGraphView::setOffsetY(int offsetY)
{
    if (m_offsetY != offsetY) {
        m_offsetY = offsetY;
        redraw(); //issue full redraw..
    }
}

// For manual X scrolling (not really needed)
void gGraphView::setOffsetX(int offsetX)
{
    if (m_offsetX != offsetX) {
        m_offsetX = offsetX;
        redraw(); //issue redraw
    }
}

void gGraphView::mouseMoveEvent(QMouseEvent *event)
{
    grabKeyboard();

    int x = event->x();
    int y = event->y();

    m_mouse = QPoint(x, y);

    if (m_sizer_dragging) { // Resize handle being dragged
        float my = y - m_sizer_point.y();
        //qDebug() << "Sizer moved vertically" << m_sizer_index << my*m_scaleY;
        float h = m_graphs[m_sizer_index]->height();
        h += my / m_scaleY;

        if (h > m_graphs[m_sizer_index]->minHeight()) {
            m_graphs[m_sizer_index]->setHeight(h);
            m_sizer_point.setX(x);
            m_sizer_point.setY(y);
            updateScrollBar();
            timedRedraw();
        }

        return;
    }

    if (m_graph_dragging) { // Title bar being dragged to reorder
        gGraph *p;
        int yy = m_sizer_point.y();
        bool empty;

        if (y < yy) {

            for (int i = m_graph_index - 1; i >= 0; i--) {
                if (m_graphs[i]->isPinned() != m_graphs[m_graph_index]->isPinned()) {
                    // fix cursor
                    continue;
                }

                empty = m_graphs[i]->isEmpty() || (!m_graphs[i]->visible());
                // swapping upwards.
                int yy2 = yy - graphSpacer - m_graphs[i]->height() * m_scaleY;
                yy2 += m_graphs[m_graph_index]->height() * m_scaleY;

                if (y < yy2) {
                    //qDebug() << "Graph Reorder" << m_graph_index;
                    p = m_graphs[m_graph_index];
                    m_graphs[m_graph_index] = m_graphs[i];
                    m_graphs[i] = p;

                    if (!empty) {
                        m_sizer_point.setY(yy - graphSpacer - m_graphs[m_graph_index]->height()*m_scaleY);
                        redraw();
                    }

                    m_graph_index--;
                }

                if (!empty) { break; }

            }
        } else if (y > yy + graphSpacer + m_graphs[m_graph_index]->height()*m_scaleY) {
            // swapping downwards
            //qDebug() << "Graph Reorder" << m_graph_index;
            for (int i = m_graph_index + 1; i < m_graphs.size(); i++) {
                if (m_graphs[i]->isPinned() != m_graphs[m_graph_index]->isPinned()) {
                    //m_graph_dragging=false;
                    // fix cursor
                    continue;
                }

                empty = m_graphs[i]->isEmpty() || (!m_graphs[i]->visible());
                p = m_graphs[m_graph_index];
                m_graphs[m_graph_index] = m_graphs[i];
                m_graphs[i] = p;

                if (!empty) {
                    m_sizer_point.setY(yy + graphSpacer + m_graphs[m_graph_index]->height()*m_scaleY);
                    timedRedraw();
                }

                m_graph_index++;

                if (!empty) { break; }
            }
        }

        return;
    }

    float py = 0, pinned_height = 0, h;
    bool done = false;

    // Do pinned graphs first
    for (const auto & graph : m_graphs) {

        if (graph->isEmpty() || !graph->visible() || !graph->isPinned()) {
            continue;
        }

        h = graph->height() * m_scaleY;
        pinned_height += h + graphSpacer;

        if (py > height()) {
            break;    // we are done.. can't draw anymore
        }

        if (!((y >= py + graph->top) && (y < py + h - graph->bottom))) {
            if (graph->isSelected()) {
                graph->deselect();
                timedRedraw(150);
            }
        }

        // Update Mouse Cursor shape
        if ((y >= py + h - 1) && (y < (py + h + graphSpacer))) {
            this->setCursor(Qt::SplitVCursor);
            done = true;
        } else if ((y >= py + 1) && (y < py + h)) {
            if (x >= titleWidth + 10) {
                this->setCursor(Qt::ArrowCursor);
            } else {
                m_tooltip->display(tr("Double click title to pin / unpin\nClick and drag to reorder graphs"), x + 10, y, TT_AlignLeft);
                timedRedraw(0);

                this->setCursor(Qt::OpenHandCursor);
            }


            m_horiz_travel += qAbs(x - m_lastxpos) + qAbs(y - m_lastypos);
            m_lastxpos = x;
            m_lastypos = y;
            //           QPoint p(x,y);
            //           QMouseEvent e(event->type(),p,event->button(),event->buttons(),event->modifiers());

            graph->mouseMoveEvent(event);

            done = true;
        }

        py += h + graphSpacer;

    }

    py = -m_offsetY;
    py += pinned_height;

    // Propagate mouseMove events to relevant graphs
    if (!done)
        for (const auto & graph : m_graphs) {

            if (graph->isEmpty() || !graph->visible() || graph->isPinned()) {
                continue;
            }

            h = graph->height() * m_scaleY;

            if (py > height()) {
                break;    // we are done.. can't draw anymore
            }

            if (!((y >= py + graph->top) && (y < py + h - graph->bottom))) {
                if (graph->isSelected()) {
                    graph->deselect();
                    timedRedraw(150);
                }
            }

            // Update Mouse Cursor shape
            if ((y >= py + h - 1) && (y < (py + h + graphSpacer))) {
                this->setCursor(Qt::SplitVCursor);
            } else if ((y >= py + 1) && (y < py + h)) {
                if (x >= titleWidth + 10) {
                    this->setCursor(Qt::ArrowCursor);
                } else {
                    m_tooltip->display(tr("Double click title to pin / unpin\nClick and drag to reorder graphs"), x + 10, y, TT_AlignLeft);
                    timedRedraw(0);

                    this->setCursor(Qt::OpenHandCursor);
                }


                m_horiz_travel += qAbs(x - m_lastxpos) + qAbs(y - m_lastypos);
                m_lastxpos = x;
                m_lastypos = y;
                if (graph) {
                    graph->mouseMoveEvent(event);
                }
            }

            /*            else if (!m_button_down && (y >= py) && (y < py+m_graphs[i]->top)) {
                            // Mouse cursor is in top graph margin.
                        } else if (!m_button_down && (y >= py+h-m_graphs[i]->bottom) && (y <= py+h)) {
                            // Mouse cursor is in bottom grpah margin.
                        } else if (m_button_down || ((y >= py+m_graphs[i]->top) && (y < py + h-m_graphs[i]->bottom))) {
                            if (m_button_down || (x >= titleWidth+10)) { //(gYAxis::Margin-5)
                                this->setCursor(Qt::ArrowCursor);
                                m_horiz_travel+=qAbs(x-m_lastxpos)+qAbs(y-m_lastypos);
                                m_lastxpos=x;
                                m_lastypos=y;
                                QPoint p(x-titleWidth,y-py);
                                QMouseEvent e(event->type(),p,event->button(),event->buttons(),event->modifiers());

                                m_graphs[i]->mouseMoveEvent(&e);
                                if (!m_button_down && (x<=titleWidth+(gYAxis::Margin-5))) {
                                    //qDebug() << "Hovering over" << m_graphs[i]->title();
                                    if (m_graphsbytitle[STR_TR_EventFlags]==m_graphs[i]) {
                                        QVector<Layer *> & layers=m_graphs[i]->layers();
                                        gFlagsGroup *fg;
                                        for (int i=0;i<layers.size();i++) {
                                            if ((fg=dynamic_cast<gFlagsGroup *>(layers[i]))!=nullptr) {
                                                float bh=fg->barHeight();
                                                int count=fg->count();
                                                float yp=py+m_graphs[i]->marginTop();
                                                    yp=y-yp;
                                                float th=(float(count)*bh);
                                                if (yp>=0 && yp<th) {
                                                    int i=yp/bh;
                                                    if (i<count) {
                                                        ChannelID code=fg->visibleLayers()[i]->code();
                                                        QString ttip=schema::channel[code].description();
                                                        m_tooltip->display(ttip,x,y-20,AppSetting->tooltipTimeout());
                                                        redraw();
                                                        //qDebug() << code << ttip;
                                                    }
                                                }

                                                break;
                                            }
                                        }
                                    } else {
                                        if (!m_graphs[i]->units().isEmpty()) {
                                            m_tooltip->display(m_graphs[i]->units(),x,y-20,AppSetting->tooltipTimeout());
                                            redraw();
                                        }
                                    }
                                }
                            } else {

                                this->setCursor(Qt::OpenHandCursor);
                            }

                        } */

            //   }
            py += h + graphSpacer;
        }

}

Layer * gGraphView::findLayer(gGraph * graph, LayerType type)
{
    for (auto & layer : graph->m_layers) {
        if (layer->layerType() == type) {
            return layer;
        }
    }
    return nullptr;
}

class MyWidgetAction : public QWidgetAction
{
public:
    MyWidgetAction(ChannelID code, QObject * parent = nullptr) :QWidgetAction(parent), code(code) { chbox = nullptr; }
protected:
    virtual QWidget * createWidget(QWidget * /*parent*/) {
        connect(chbox, SIGNAL(toggled(bool)), this, SLOT(setChecked(bool)));
        connect(chbox, SIGNAL(clicked()), this, SLOT(trigger()));

        return chbox;
    }
    QCheckBox * chbox;
    ChannelID code;
};


MinMaxWidget::MinMaxWidget(gGraph * graph, QWidget *parent)
:QWidget(parent), graph(graph)
{
    step = 1;
    createLayout();
}

void MinMaxWidget::onMinChanged(double d)
{
    graph->rec_miny = d;
    graph->timedRedraw(0);
}
void MinMaxWidget::onMaxChanged(double d)
{
    graph->rec_maxy = d;
    graph->timedRedraw(0);
}
void MinMaxWidget::onResetClicked()
{
    ZoomyScaling tmp = graph->zoomY();
    graph->setZoomY(ZS_AUTO_FIT);
    EventDataType miny = graph->MinY(),
                  maxy = graph->MaxY();

    graph->roundY(miny, maxy);
    setMin(graph->rec_miny = miny);
    setMax(graph->rec_maxy = maxy);

    float r = maxy-miny;
    if (r > 400) {
        step = 50;
    } else if (r > 100) {
        step = 10;
    } else if (r > 50) {
        step = 5;
    } else {
        step = 1;
    }

    graph->setZoomY(tmp);
}

void MinMaxWidget::onComboChanged(int _idx)
{
    ZoomyScaling idx = static_cast<ZoomyScaling>(_idx) ;
    minbox->setEnabled(idx == ZS_OVERRIDE);
    maxbox->setEnabled(idx == ZS_OVERRIDE);
    reset->setEnabled(idx == ZS_OVERRIDE);

    graph->setZoomY(idx);

    if (idx == ZS_OVERRIDE) {
        if (qAbs(graph->rec_maxy - graph->rec_miny) < 0.0001) {
            onResetClicked();
        }
    }
}

void MinMaxWidget::createLayout()
{
    QGridLayout * layout = new QGridLayout;
    layout->setMargin(4);
    layout->setSpacing(4);

    combobox = new QComboBox(this);
    combobox->addItem(tr("Auto-Fit"), ZS_AUTO_FIT);
    combobox->addItem(tr("Defaults"), ZS_DEFAULT);
    combobox->addItem(tr("Override"), ZS_OVERRIDE);
    combobox->setToolTip(tr("The Y-Axis scaling mode, 'Auto-Fit' for automatic scaling, 'Defaults' for settings according to manufacturer, and 'Override' to choose your own."));
    connect(combobox, SIGNAL(activated(int)), this, SLOT(onComboChanged(int)));

    minbox = new QDoubleSpinBox(this);
    maxbox = new QDoubleSpinBox(this);

    minbox->setToolTip(tr("The Minimum Y-Axis value.. Note this can be a negative number if you wish."));
    maxbox->setToolTip(tr("The Maximum Y-Axis value.. Must be greater than Minimum to work."));

    int idx = graph->zoomY();
    combobox->setCurrentIndex(idx);

    minbox->setEnabled(idx == 2);
    maxbox->setEnabled(idx == 2);

    minbox->setAlignment(Qt::AlignRight);
    maxbox->setAlignment(Qt::AlignRight);

    minbox->setMinimum(-9999.0);
    maxbox->setMinimum(-9999.0);
    minbox->setMaximum(9999.99);
    maxbox->setMaximum(9999.99);
    setMin(graph->rec_miny);
    setMax(graph->rec_maxy);

    float r = graph->rec_maxy - graph->rec_miny;
    if (r > 400) {
        step = 50;
    } else if (r > 100) {
        step = 10;
    } else if (r > 50) {
        step = 5;
    } else {
        step = 1;
    }

    minbox->setSingleStep(step);
    maxbox->setSingleStep(step);

    connect(minbox, SIGNAL(valueChanged(double)), this, SLOT(onMinChanged(double)));
    connect(maxbox, SIGNAL(valueChanged(double)), this, SLOT(onMaxChanged(double)));

    QLabel * label = new QLabel(tr("Scaling Mode"));
    QFont font = label->font();
    font.setBold(true);
    label->setFont(font);
    label->setAlignment(Qt::AlignCenter);
    layout->addWidget(label,0,0);
    layout->addWidget(combobox,1,0);

    label = new QLabel(STR_TR_Min);
    label->setFont(font);
    label->setAlignment(Qt::AlignCenter);
    layout->addWidget(label,0,1);
    layout->addWidget(minbox,1,1);

    label = new QLabel(STR_TR_Max);
    label->setFont(font);
    label->setAlignment(Qt::AlignCenter);
    layout->addWidget(label,0,2);
    layout->addWidget(maxbox,1,2);

    reset = new QToolButton(this);
    reset->setIcon(QIcon(":/icons/refresh.png"));
    reset->setToolTip(tr("This button resets the Min and Max to match the Auto-Fit"));
    reset->setEnabled(idx == 2);

    layout->addWidget(reset,1,3);
    connect(reset, SIGNAL(clicked()), this, SLOT(onResetClicked()));
    this->setLayout(layout);
}

void gGraphView::populateMenu(gGraph * graph)
{
    QAction * action;

    if (graph->isSnapshot()) {
        snap_action->setText(tr("Remove Clone"));
        snap_action->setData(graph->name()+"|remove");
       // zoom100_action->setVisible(false);
    } else {
        snap_action->setText(tr("Clone %1 Graph").arg(graph->title()));
        snap_action->setData(graph->name()+"|snapshot");
      //  zoom100_action->setVisible(true);
    }

    // Menu title fonts
    QFont font = QApplication::font();
    font.setBold(true);
    font.setPointSize(font.pointSize() + 3);

    gLineChart * lc = dynamic_cast<gLineChart *>(findLayer(graph,LT_LineChart));
    SummaryChart * sc = dynamic_cast<SummaryChart *>(findLayer(graph,LT_SummaryChart));
    gSummaryChart * stg = dynamic_cast<gSummaryChart *>(findLayer(graph,LT_Overview));

    limits_menu->clear();
    if (lc || sc || stg) {
        QWidgetAction * widget = new QWidgetAction(this);
        MinMaxWidget * minmax = new MinMaxWidget(graph, this);

        widget->setDefaultWidget(minmax);

        limits_menu->addAction(widget);
        limits_menu->menuAction()->setVisible(true);
    } else {
        limits_menu->menuAction()->setVisible(false);
    }

    // First check for any linechart for this graph..
    if (lc) {
        lines_menu->clear();
        for (int i=0, end=lc->m_dotlines.size(); i < end; i++) {
            const DottedLine & dot = lc->m_dotlines[i];

            if (!lc->m_enabled[dot.code]) continue;

            schema::Channel &chan = schema::channel[dot.code];

            if (dot.available) {

                QWidgetAction * widget = new QWidgetAction(context_menu);

                QCheckBox *chbox = new QCheckBox(chan.calc[dot.type].label(), context_menu);
                chbox->setMouseTracking(true);
                chbox->setStyleSheet(QString("QCheckBox:hover { background: %1; }").arg(QApplication::palette().highlight().color().name()));

                widget->setDefaultWidget(chbox);

                widget->setCheckable(true);
                widget->setData(QString("%1|%2").arg(graph->name()).arg(i));

                connect(chbox, SIGNAL(toggled(bool)), widget, SLOT(setChecked(bool)));
                connect(chbox, SIGNAL(clicked()), widget, SLOT(trigger()));

                bool b = lc->m_dot_enabled[dot.code][dot.type]; //chan.calc[dot.type].enabled;
                chbox->setChecked(b);
                lines_menu->addAction(widget);
            }
        }

        lines_menu->menuAction()->setVisible(lines_menu->actions().size() > 0);

        if (lines_menu->actions().size() > 0) {
            lines_menu->insertSeparator(lines_menu->actions()[0]);
            action = new QAction(QString("%1").arg(graph->title()), lines_menu);
            lines_menu->insertAction(lines_menu->actions()[0], action);
            action->setFont(font);
            action->setData(QString(""));
            action->setEnabled(false);

        }

        //////////////////////////////////////////////////////////////////////////////////////
        // Populate Plots Menus
        //////////////////////////////////////////////////////////////////////////////////////

        plots_menu->clear();

        for (const auto code : lc->m_codes) {
            if (lc->m_day && !lc->m_day->channelHasData(code)) continue;

            QWidgetAction * widget = new QWidgetAction(context_menu);

            QCheckBox *chbox = new QCheckBox(schema::channel[code].label(), context_menu);
            chbox->setMouseTracking(true);
            chbox->setToolTip(schema::channel[code].description());
            chbox->setStyleSheet(QString("QCheckBox:hover { background: %1; }").arg(QApplication::palette().highlight().color().name()));


            widget->setDefaultWidget(chbox);

            widget->setCheckable(true);
            widget->setData(QString("%1|%2").arg(graph->name()).arg(code));

            connect(chbox, SIGNAL(toggled(bool)), widget, SLOT(setChecked(bool)));
            connect(chbox, SIGNAL(clicked()), widget, SLOT(trigger()));

            bool b = lc->m_enabled[code];
            chbox->setChecked(b);

            plots_menu->addAction(widget);
        }

        plots_menu->menuAction()->setVisible((plots_menu->actions().size() > 1));

        if (plots_menu->actions().size() > 0) {
            plots_menu->insertSeparator(plots_menu->actions()[0]);
            action = new QAction(QString("%1").arg(graph->title()), plots_menu);
            plots_menu->insertAction(plots_menu->actions()[0], action);

            action->setFont(font);
            action->setData(QString(""));
            action->setEnabled(false);
        }

        //////////////////////////////////////////////////////////////////////////////////////
        // Populate Event Menus
        //////////////////////////////////////////////////////////////////////////////////////
        oximeter_menu->clear();
        cpap_menu->clear();

        using namespace schema;
        quint32 showflags = schema::FLAG | schema::MINOR_FLAG | schema::SPAN;
        if (p_profile->general->showUnknownFlags()) showflags |= schema::UNKNOWN;
        QList<ChannelID> chans = lc->m_day->getSortedMachineChannels(showflags);

        QHash<MachineType, int> Vis;

        for (const auto code : chans) {
            schema::Channel & chan = schema::channel[code];

            QWidgetAction * widget = new QWidgetAction(context_menu);

            QCheckBox *chbox = new QCheckBox(schema::channel[code].fullname(), context_menu);
            chbox->setPalette(context_menu->palette());
            chbox->setMouseTracking(true);
            chbox->setToolTip(schema::channel[code].description());
            chbox->setStyleSheet(QString("QCheckBox:hover { background: %1; }").arg(QApplication::palette().highlight().color().name()));

            widget->setDefaultWidget(chbox);

            widget->setCheckable(true);
            widget->setData(QString("%1|%2").arg(graph->name()).arg(code));

            connect(chbox, SIGNAL(toggled(bool)), widget, SLOT(setChecked(bool)));
            connect(chbox, SIGNAL(clicked()), widget, SLOT(trigger()));

            bool b = lc->m_flags_enabled[code];
            chbox->setChecked(b);
            Vis[chan.machtype()] += b ? 1 : 0;

            action = nullptr;
            if (chan.machtype() == MT_OXIMETER) {
                oximeter_menu->insertAction(nullptr, widget);
            } else if ( chan.machtype() == MT_CPAP) {
                cpap_menu->insertAction(nullptr,widget);
            }
        }

        QString HideAllEvents = QObject::tr("Hide All Events");
        QString ShowAllEvents = QObject::tr("Show All Events");

        oximeter_menu->menuAction()->setVisible(oximeter_menu->actions().size() > 0);
        cpap_menu->menuAction()->setVisible(cpap_menu->actions().size() > 0);


        if (cpap_menu->actions().size() > 0) {
            cpap_menu->addSeparator();
            if (Vis[MT_CPAP] > 0) {
                action = cpap_menu->addAction(HideAllEvents);
                action->setData(QString("%1|HideAll:CPAP").arg(graph->name()));
            } else {
                action = cpap_menu->addAction(ShowAllEvents);
                action->setData(QString("%1|ShowAll:CPAP").arg(graph->name()));
            }

            // Show CPAP Events menu Header...
            cpap_menu->insertSeparator(cpap_menu->actions()[0]);
            action = new QAction(QString("%1").arg(graph->title()), cpap_menu);
            cpap_menu->insertAction(cpap_menu->actions()[0], action);
            action->setFont(font);
            action->setData(QString(""));
            action->setEnabled(false);
        }
        if (oximeter_menu->actions().size() > 0) {
            oximeter_menu->addSeparator();
            if (Vis[MT_OXIMETER] > 0) {
                action = oximeter_menu->addAction(HideAllEvents);
                action->setData(QString("%1|HideAll:OXI").arg(graph->name()));
            } else {
                action = oximeter_menu->addAction(ShowAllEvents);
                action->setData(QString("%1|ShowAll:OXI").arg(graph->name()));
            }

            oximeter_menu->insertSeparator(oximeter_menu->actions()[0]);
            action = new QAction(QString("%1").arg(graph->title()), oximeter_menu);
            oximeter_menu->insertAction(oximeter_menu->actions()[0], action);
            action->setFont(font);
            action->setData(QString(""));
            action->setEnabled(false);
        }

    } else {
        lines_menu->clear();
        lines_menu->menuAction()->setVisible(false);
        plots_menu->clear();
        plots_menu->menuAction()->setVisible(false);
        oximeter_menu->clear();
        oximeter_menu->menuAction()->setVisible(false);
        cpap_menu->clear();
        cpap_menu->menuAction()->setVisible(false);
    }
}

void gGraphView::onSnapshotGraphToggle()
{
    QString name = snap_action->data().toString().section("|",0,0);
    QString cmd = snap_action->data().toString().section("|",-1).toLower();
    auto it = m_graphsbyname.find(name);
    if (it == m_graphsbyname.end()) return;

    gGraph * graph = it.value();

    if (cmd == "snapshot") {

        QString basename = name+";";
        if (graph->m_day) {
            // append the date of the graph's left edge to the snapshot name
            // so the user knows what day the snapshot starts
            // because the name is displayed to the user, use local time
            QDateTime date = QDateTime::fromMSecsSinceEpoch(graph->min_x, Qt::LocalTime);
            basename += date.date().toString(Qt::SystemLocaleLongDate);
        }
        QString newname;

        // Find a new name.. How many snapshots for each graph counts as stupid?
        for (int i=1;i < 100;i++) {
            newname = basename+" ("+QString::number(i)+")";

            it = m_graphsbyname.find(newname);
            if (it == m_graphsbyname.end()) {
                break;
            }
        }

        QString newtitle;
        bool fnd = false;
        // someday, some clown will keep adding new graphs to break this..
        for (int i=1; i < 100; i++) {
            newtitle = graph->title()+"-"+QString::number(i);
            fnd = false;
            for (const auto & graph : m_graphs) {
                if (graph->title() == newtitle) {
                    fnd = true;
                    break;
                }
            }
            if (!fnd) break;
        }
        if (fnd) {
            // holy crap.. what patience. but not what I meant by as many as you like ;)
            return;
        }

        gGraph * newgraph = new gGraph(newname, nullptr, newtitle, graph->units(), graph->height(), graph->group());
       // newgraph->setBlockSelect(true);
        newgraph->setHeight(graph->height());

        short group = 0;
        m_graphs.insert(m_graphs.indexOf(graph)+1, newgraph);
        m_graphsbyname[newname] = newgraph;
        newgraph->m_graphview = this;

        for (const auto & l : graph->m_layers) {
            Layer * layer = l->Clone();
            if (layer) {
                newgraph->m_layers.append(layer);
            }
        }

        for (const auto & g : m_graphs) {
            group = qMax(g->group(), group);
        }
        newgraph->setGroup(group+1);
        //newgraph->setMinHeight(pm.height());

        newgraph->setDay(graph->m_day);
        if (graph->m_day) {
            graph->m_day->incUseCounter();
        }
        newgraph->min_x = graph->min_x;
        newgraph->max_x = graph->max_x;
        if (graph->blockZoom()) {
            newgraph->setBlockZoom(graph->blockZoom());
            newgraph->setBlockSelect(true);
        }
        if (graph->blockSelect()) {
            newgraph->setBlockSelect(true);
        }
        newgraph->setZoomY(graph->zoomY());

        newgraph->setSnapshot(true);

        emit GraphsChanged();

//        addGraph(newgraph);
        updateScale();
        timedRedraw(0);
    } else if (cmd == "remove") {
        if (graph->m_day) {
            graph->m_day->decUseCounter();
            if (graph->m_day->useCounter() == 0) {
            }
        }
        m_graphsbyname.remove(graph->name());
        m_graphs.removeAll(it.value());
        delete graph;

        updateScale();
        timedRedraw(0);

        emit GraphsChanged();
    }
    qDebug() << cmd << name;
}

bool gGraphView::hasSnapshots()
{
    bool snap = false;
    for (const auto & graph : m_graphs) {
        if (graph->isSnapshot()) {
            snap = true;
            break;
        }
    }
    return snap;
}


void gGraphView::onPlotsClicked(QAction *action)
{
    QString name = action->data().toString().section("|",0,0);
    ChannelID code = action->data().toString().section("|",-1).toInt();

    auto it = m_graphsbyname.find(name);
    if (it == m_graphsbyname.end()) return;

    gGraph * graph = it.value();

    gLineChart * lc = dynamic_cast<gLineChart *>(findLayer(graph, LT_LineChart));

    if (!lc) return;

    lc->m_enabled[code] = !lc->m_enabled[code];
    graph->min_y = graph->MinY();
    graph->max_y = graph->MaxY();
    graph->timedRedraw(0);
//    lc->Miny();
//    lc->Maxy();
}

void gGraphView::onOverlaysClicked(QAction *action)
{
    QString name = action->data().toString().section("|",0,0);
    QString data = action->data().toString().section("|",-1);
    auto it = m_graphsbyname.find(name);
    if (it == m_graphsbyname.end()) return;
    gGraph * graph = it.value();

    gLineChart * lc = dynamic_cast<gLineChart *>(findLayer(graph, LT_LineChart));

    if (!lc) return;

    bool ok;
    ChannelID code = data.toInt(&ok);
    if (ok) {
        // Just toggling a flag on/off
        bool b = ! lc->m_flags_enabled[code];
        lc->m_flags_enabled[code] = b;
        QWidgetAction * widget = qobject_cast<QWidgetAction *>(action);
        if (widget) {
            widget->setChecked(b);
        }
        timedRedraw(0);
        return;
    }

    QString hideall = data.section(":",0,0);

    if ((hideall == "HideAll") || (hideall == "ShowAll")) {

        bool value = (hideall == "HideAll") ? false : true;
        QString group = data.section(":",-1).toUpper();
        MachineType mtype;
        if (group == "CPAP") mtype = MT_CPAP;
        else if (group == "OXI") mtype = MT_OXIMETER;
        else mtype = MT_UNKNOWN;

        // First toggle the actual flag bits
        for (auto it=lc->m_flags_enabled.begin(), end=lc->m_flags_enabled.end(); it != end; ++it) {
            if (schema::channel[it.key()].machtype() == mtype) {
                lc->m_flags_enabled[it.key()] = value;
            }
        }

        // Now toggle the menu actions.. bleh
        if (mtype == MT_CPAP) {
            for (auto & action : cpap_menu->actions()) {
                if (action->isCheckable())  {
                    action->setChecked(value);
                }
            }
        } else if (mtype == MT_OXIMETER) {
            for (auto & action : oximeter_menu->actions()) {
                if (action->isCheckable())  {
                    action->setChecked(value);
                }
            }
        }
    }

}


void gGraphView::onLinesClicked(QAction *action)
{
    QString name = action->data().toString().section("|",0,0);
    QString data = action->data().toString().section("|",-1);

    auto it = m_graphsbyname.find(name);
    if (it == m_graphsbyname.end()) return;

    gGraph * graph = it.value();

    gLineChart * lc = dynamic_cast<gLineChart *>(findLayer(graph, LT_LineChart));

    if (!lc) return;

    bool ok;
    int i = data.toInt(&ok);
    if (ok) {
        DottedLine & dot = lc->m_dotlines[i];
        schema::Channel &chan = schema::channel[dot.code];

        chan.calc[dot.type].enabled = !chan.calc[dot.type].enabled;
        lc->m_dot_enabled[dot.code][dot.type] = !lc->m_dot_enabled[dot.code][dot.type];

    }
    timedRedraw(0);
}


void gGraphView::mousePressEvent(QMouseEvent *event)
{
    int x = event->x();
    int y = event->y();

    float h, pinned_height = 0, py = 0;

    bool done = false;

    // first handle pinned graphs.
    // Calculate total height of all pinned graphs
    for (int i=0, end=m_graphs.size(); i<end; ++i) {
        gGraph * g = m_graphs[i];

        if (!g || g->isEmpty() || !g->visible() || !g->isPinned()) {
            continue;
        }

        h = g->height() * m_scaleY;
        pinned_height += h + graphSpacer;

        if (py > height()) {
            break;
        }

        if ((py + h + graphSpacer) >= 0) {
            if ((y >= py + h - 1) && (y <= py + h + graphSpacer)) {
                this->setCursor(Qt::SplitVCursor);
                m_sizer_dragging = true;
                m_sizer_index = i;
                m_sizer_point.setX(x);
                m_sizer_point.setY(y);
                done = true;
            } else if ((y >= py) && (y < py + h)) {
                //qDebug() << "Clicked" << i;
                if ((event->button() == Qt::LeftButton) && (x < titleWidth + 20)) {
                    // clicked on title to drag graph..
                    // Note: reorder has to be limited to pinned graphs.
                    m_graph_dragging = true;
                    m_tooltip->cancel();

                    timedRedraw(50);
                    m_graph_index = i;
                    m_sizer_point.setX(x);
                    m_sizer_point.setY(py); // point at top of graph..
                    this->setCursor(Qt::ClosedHandCursor);
                    //done=true;
                } else if ((event->button() == Qt::RightButton) && (x < (titleWidth + gYAxis::Margin))) {
                    this->setCursor(Qt::ArrowCursor);
                    pin_action->setText(QObject::tr("Unpin %1 Graph").arg(g->title()));
                    pin_graph = g;
                    popout_action->setText(QObject::tr("Popout %1 Graph").arg(g->title()));
                    popout_graph = g;

                    populateMenu(g);
                    context_menu->popup(event->globalPos());
                    //done=true;
                } else if (!g->blockSelect()) {
                    if (m_metaselect) {
                        if (m_selected_graph) {
                            m_selected_graph->m_selecting_area = false;
                        }
                    }
                    // send event to graph..
                    m_point_clicked = QPoint(event->x(), event->y());

                    //QMouseEvent e(event->type(),m_point_clicked,event->button(),event->buttons(),event->modifiers());


                    m_button_down = true;
                    m_metaselect = event->modifiers() & Qt::AltModifier;
                    m_horiz_travel = 0;
                    m_graph_index = i;
                    m_selected_graph = g;
                    g->mousePressEvent(event);
                }

                done = true;
            }

        }

        py += h + graphSpacer;
    }



    // then handle the remainder...
    py = -m_offsetY;
    py += pinned_height;

    if (!done) {
        for (int i=0, end=m_graphs.size(); i<end; ++i) {
            gGraph * g = m_graphs[i];

            if (!g || g->isEmpty() || !g->visible() || g->isPinned()) { continue; }

            h = g->height() * m_scaleY;

            if (py > height()) {
                break;
            }

            if ((py + h + graphSpacer) >= 0) {
                if ((y >= py + h - 1) && (y <= py + h + graphSpacer)) {
                    this->setCursor(Qt::SplitVCursor);
                    m_sizer_dragging = true;
                    m_sizer_index = i;
                    m_sizer_point.setX(x);
                    m_sizer_point.setY(y);
                    //qDebug() << "Sizer clicked" << i;
                    //done=true;
                } else if ((y >= py) && (y < py + h)) {
                    //qDebug() << "Clicked" << i;

                    if ((event->button() == Qt::LeftButton) && (x < (titleWidth + 20))) { // clicked on title to drag graph..
                        m_graph_dragging = true;
                        m_tooltip->cancel();
                        redraw();
                        m_graph_index = i;
                        m_sizer_point.setX(x);
                        m_sizer_point.setY(py); // point at top of graph..
                        this->setCursor(Qt::ClosedHandCursor);
                        //done=true;
                    } else if ((event->button() == Qt::RightButton) && (x < (titleWidth + gYAxis::Margin))) {
                        this->setCursor(Qt::ArrowCursor);
                        popout_action->setText(QObject::tr("Popout %1 Graph").arg(g->title()));
                        popout_graph = g;
                        pin_action->setText(QObject::tr("Pin %1 Graph").arg(g->title()));
                        pin_graph = g;
                        populateMenu(g);

                        context_menu->popup(event->globalPos());
                        //done=true;
                    } else if (!g->blockSelect()) {
                       if (m_metaselect) {
                            if (m_selected_graph) {
                                m_selected_graph->m_selecting_area = false;
                            }
                        }
                        // send event to graph..
                        m_point_clicked = QPoint(event->x(), event->y());
                        //QMouseEvent e(event->type(),m_point_clicked,event->button(),event->buttons(),event->modifiers());
                        m_button_down = true;
                        m_metaselect = event->modifiers() & Qt::AltModifier;

                        m_horiz_travel = 0;
                        m_graph_index = i;
                        m_selected_graph = g;
                        g->mousePressEvent(event);
                    }
                }

            }

            py += h + graphSpacer;
            done=true;
        }
    }
    if (!done) {
//        if (event->button() == Qt::RightButton) {
//            this->setCursor(Qt::ArrowCursor);
//            context_menu->popup(event->globalPos());
//            done=true;
//        }
    }
}

void gGraphView::mouseReleaseEvent(QMouseEvent *event)
{

    int x = event->x();
    int y = event->y();

    float h, py = 0, pinned_height = 0;
    bool done = false;


    // Copy to a local variable to make sure this gets cleared
    bool button_down = m_button_down;
    m_button_down = false;

    // Handle pinned graphs first
    for (const auto & g : m_graphs) {

        if (!g || g->isEmpty() || !g->visible() || !g->isPinned()) {
            continue;
        }

        h = g->height() * m_scaleY;
        pinned_height += h + graphSpacer;

        if (py > height()) {
            break;    // we are done.. can't draw anymore
        }

        if ((y >= py + h - 1) && (y < (py + h + graphSpacer))) {
            this->setCursor(Qt::SplitVCursor);
            done = true;
        } else if ((y >= py + 1) && (y <= py + h)) {

            //            if (!m_sizer_dragging && !m_graph_dragging) {
            //               g->mouseReleaseEvent(event);
            //            }

            if (x >= titleWidth + 10) {
                this->setCursor(Qt::ArrowCursor);
            } else {
                this->setCursor(Qt::OpenHandCursor);
            }

            done = true;
        }

        py += h + graphSpacer;
    }

    // Now do the unpinned ones
    py = -m_offsetY;
    py += pinned_height;

    if (done)
        for (const auto & g : m_graphs) {

            if (!g || g->isEmpty() || !g->visible() || g->isPinned()) {
                continue;
            }

            h = g->height() * m_scaleY;

            if (py > height()) {
                break;    // we are done.. can't draw anymore
            }

            if ((y >= py + h - 1) && (y < (py + h + graphSpacer))) {
                this->setCursor(Qt::SplitVCursor);
            } else if ((y >= py + 1) && (y <= py + h)) {

                //            if (!m_sizer_dragging && !m_graph_dragging) {
                //                g->mouseReleaseEvent(event);
                //            }

                if (x >= titleWidth + 10) {
                    this->setCursor(Qt::ArrowCursor);
                } else {
                    this->setCursor(Qt::OpenHandCursor);
                }
            }

            py += h + graphSpacer;
        }

    if (m_sizer_dragging) {
        m_sizer_dragging = false;
        return;
    }

    if (m_graph_dragging) {
        m_graph_dragging = false;

        // not sure why the cursor code doesn't catch this..
        if (x >= titleWidth + 10) {
            this->setCursor(Qt::ArrowCursor);
        } else {
            this->setCursor(Qt::OpenHandCursor);
        }

        return;
    }

    // The graph that got the button press gets the release event
    if (button_down) {
//        m_button_down = false;
        m_metaselect = event->modifiers() & Qt::AltModifier;
        saveHistory();

        if (m_metaselect) {
            m_point_released = event->pos();
        } else {
            if ((m_graph_index >= 0) && (m_graphs[m_graph_index])) {
                m_graphs[m_graph_index]->mouseReleaseEvent(event);
            }
        }
    }
    timedRedraw(0);
}

void gGraphView::keyReleaseEvent(QKeyEvent *event)
{
    if (m_metaselect && !(event->modifiers() & Qt::AltModifier)) {
        QMouseEvent mevent(QEvent::MouseButtonRelease, m_point_released, Qt::LeftButton, Qt::LeftButton, event->modifiers());
        if (m_graph_index>=0) {
            m_graphs[m_graph_index]->mouseReleaseEvent(&mevent);
        }

        m_metaselect = false;
        timedRedraw(50);
    }
    if (event->key() == Qt::Key_Escape) {
        if (history.size() > 0) {
            SelectionHistoryItem h = history.takeFirst();
            SetXBounds(h.minx, h.maxx);

            // could Forward push this to another list?
        } else {
            ResetBounds();

        }
        return;
    }
#ifdef BROKEN_OPENGL_BUILD
        QWidget::keyReleaseEvent(event);
#elif QT_VERSION < QT_VERSION_CHECK(5,4,0)
        QGLWidget::keyReleaseEvent(event);
#else
        QOpenGLWidget::keyReleaseEvent(event);
#endif
}


void gGraphView::mouseDoubleClickEvent(QMouseEvent *event)
{
    mousePressEvent(event); // signal missing.. a qt change might "fix" this if we are not careful.

    int x = event->x();
    int y = event->y();

    float h, py = 0, pinned_height = 0;
    bool done = false;

    // Handle pinned graphs first
    for (const auto & g : m_graphs) {
        if (!g || g->isEmpty() || !g->visible() || !g->isPinned()) {
            continue;
        }

        h = g->height() * m_scaleY;
        pinned_height += h + graphSpacer;

        if (py > height()) {
            break;    // we are done.. can't draw anymore
        }

        if ((py + h + graphSpacer) >= 0) {
            if ((y >= py) && (y <= py + h)) {
                if (x < titleWidth) {
                    // What to do when double clicked on the graph title ??

                    g->mouseDoubleClickEvent(event);
                    // pin the graph??
                    g->setPinned(false);
                    redraw();
                } else {
                    // send event to graph..
                    g->mouseDoubleClickEvent(event);
                }

                done = true;
            } else if ((y >= py + h) && (y <= py + h + graphSpacer + 1)) {
                // What to do when double clicked on the resize handle?
                done = true;
            }
        }

        py += h;
        py += graphSpacer; // do we want the extra spacer down the bottom?
    }


    py = -m_offsetY;
    py += pinned_height;

    if (!done) // then handle unpinned graphs
        for (const auto & g : m_graphs) {
            if (!g || g->isEmpty() || !g->visible() || g->isPinned()) {
                continue;
            }

            h = g->height() * m_scaleY;

            if (py > height()) {
                break;
            }

            if ((py + h + graphSpacer) >= 0) {
                if ((y >= py) && (y <= py + h)) {
                    if (x < titleWidth) {
                        // What to do when double clicked on the graph title ??
                        g->mouseDoubleClickEvent(event);

                        g->setPinned(true);
                        redraw();
                    } else {
                        // send event to graph..
                        g->mouseDoubleClickEvent(event);
                    }
                } else if ((y >= py + h) && (y <= py + h + graphSpacer + 1)) {
                    // What to do when double clicked on the resize handle?
                }

            }

            py += h;
            py += graphSpacer; // do we want the extra spacer down the bottom?
        }
}

void gGraphView::wheelEvent(QWheelEvent *event)
{
    // Hmm.. I could optionalize this to change mousewheel behaviour without affecting the scrollbar now..

    if (m_button_down)
        return;

    if (event->modifiers() == Qt::NoModifier) {
        int scrollDampening = AppSetting->scrollDampening();

        if (event->orientation() == Qt::Vertical) { // Vertical Scrolling
            if (horizScrollTime.elapsed() < scrollDampening) {
                return;
            }

            if (m_scrollbar)
                m_scrollbar->SendWheelEvent(event); // Just forwarding the event to scrollbar for now..
            m_tooltip->cancel();
            vertScrollTime.start();
            return;
        }

        // (This is a total pain in the butt on MacBook touchpads..)

        if (vertScrollTime.elapsed() < scrollDampening) {
            return;
        }
        horizScrollTime.start();
    }

    gGraph *graph = nullptr;
    int group = 0;
    //int x = event->x();
    int y = event->y();

    float h, py = 0, pinned_height = 0;


    // Find graph hovered over
    for (const auto & g : m_graphs) {

        if (!g || g->isEmpty() || !g->visible() || !g->isPinned()) {
            continue;
        }

        h = g->height() * m_scaleY;
        pinned_height += h + graphSpacer;

        if (py > height()) {
            break;    // we are done.. can't draw anymore
        }

        if ((py + h + graphSpacer) >= 0) {
            if ((y >= py) && (y <= py + h)) {
                graph = g;
                break;
            } else if ((y >= py + h) && (y <= py + h + graphSpacer + 1)) {
                // What to do when double clicked on the resize handle?
                graph = g;
                break;
            }
        }

        py += h;
        py += graphSpacer; // do we want the extra spacer down the bottom?
    }
    if (!graph) {
        py = -m_offsetY;
        py += pinned_height;

        for (const auto & g : m_graphs) {
            if (!g || g->isEmpty() || !g->visible() || g->isPinned()) {
                continue;
            }

            h = g->height() * m_scaleY;

            if (py > height()) {
                break;
            }

            if ((py + h + graphSpacer) >= 0) {
                if ((y >= py) && (y <= py + h)) {
                    graph = g;
                    break;
                } else if ((y >= py + h) && (y <= py + h + graphSpacer + 1)) {
                    // What to do when double clicked on the resize handle?
                    graph = g;
                    break;
                }

            }

            py += h;
            py += graphSpacer; // do we want the extra spacer down the bottom?
        }
    }


    if (event->modifiers() == Qt::NoModifier) {
        if (!graph) {
            // just pick any graph then
            for (const auto & g : m_graphs) {
                if (!g) continue;
                if (!g->isEmpty()) {
                    graph = g;
                    group = graph->group();
                    break;
                }
            }
        } else group=graph->group();

        if (!graph) { return; }

        double xx = (graph->max_x - graph->min_x);
        double zoom = 240.0;

        int delta = event->delta();

        if (delta > 0) {
            graph->min_x -= (xx / zoom) * (float)abs(delta);
        } else {
            graph->min_x += (xx / zoom) * (float)abs(delta);
        }

        graph->max_x = graph->min_x + xx;

        if (graph->min_x < graph->rmin_x) {
            graph->min_x = graph->rmin_x;
            graph->max_x = graph->rmin_x + xx;
        }

        if (graph->max_x > graph->rmax_x) {
            graph->max_x = graph->rmax_x;
            graph->min_x = graph->max_x - xx;
        }

        saveHistory();
        SetXBounds(graph->min_x, graph->max_x, group);

    } else if ((event->modifiers() & Qt::ControlModifier)) {

        if (graph) graph->wheelEvent(event);
//        int x = event->x();
//        int y = event->y();

//        float py = -m_offsetY;
//        float h;



//        for (int i = 0; i < m_graphs.size(); i++) {
//            gGraph *g = m_graphs[i];
//            if (!g || g->isEmpty() || !g->visible()) { continue; }

//            h = g->height() * m_scaleY;

//            if (py > height()) {
//                break;
//            }

//            if ((py + h + graphSpacer) >= 0) {
//                if ((y >= py) && (y <= py + h)) {
//                    if (x < titleWidth) {
//                        // What to do when ctrl+wheel is used on the graph title ??
//                    } else {
//                        // send event to graph..
//                        g->wheelEvent(event);
//                    }
//                } else if ((y >= py + h) && (y <= py + h + graphSpacer + 1)) {
//                    // What to do when the wheel is used on the resize handle?
//                }

//            }

//            py += h;
//            py += graphSpacer; // do we want the extra spacer down the bottom?
//        }
    }
}

void gGraphView::getSelectionTimes(qint64 & start, qint64 & end)
{
    if (m_graph_index >= 0) {
        gGraph *g = m_graphs[m_graph_index];
        if (!g) {
            start = 0;
            end = 0;
            return;
        }
        int x1 = g->m_selection.x() + titleWidth;
        int x2 = x1 + g->m_selection.width();
        start = g->screenToTime(x1);
        end = g->screenToTime(x2);
    }
}

void gGraphView::keyPressEvent(QKeyEvent *event)
{
    m_metaselect = event->modifiers() & Qt::AltModifier;
    if (m_metaselect && ((event->key() == Qt::Key_B) || (event->key() == 8747))) {
        if (mainwin->getDaily()->graphView() == this) {
            if (m_graph_index >= 0) {
                m_metaselect=false;
                qint64 start,end;
                getSelectionTimes(start,end);
                QDateTime d1 = QDateTime::fromMSecsSinceEpoch(start, Qt::LocalTime);

                mainwin->getDaily()->addBookmark(start, end, QString("Bookmark at %1").arg(d1.time().toString("HH:mm:ss")));
                m_graphs[m_graph_index]->cancelSelection();
                m_graph_index = -1;
                timedRedraw(0);
            }
            event->accept();
            return;
        }
    }

    if ((m_metaselect) && (event->key() >= Qt::Key_0) && (event->key() <= Qt::Key_9)) {
        //int bk = (int)event->key()-Qt::Key_0;
        m_metaselect = false;

        timedRedraw(0);
    }

    if (event->key() == Qt::Key_F3) {
        AppSetting->setLineCursorMode(!AppSetting->lineCursorMode());
        timedRedraw(0);
    }
    if ((event->key() == Qt::Key_F1)) {
        dumpInfo();
    }

    if (event->key() == Qt::Key_Tab) {
        event->ignore();
        return;
    }

    if (event->key() == Qt::Key_PageUp) {
        if (m_scrollbar) {
            m_offsetY -= AppSetting->graphHeight() * 3 * m_scaleY;
            m_scrollbar->setValue(m_offsetY);
            m_offsetY = m_scrollbar->value();
            redraw();
        }
        return;
    } else if (event->key() == Qt::Key_PageDown) {
        if (m_scrollbar) {
            m_offsetY += AppSetting->graphHeight() * 3 * m_scaleY;

            if (m_offsetY < 0) { m_offsetY = 0; }

            m_scrollbar->setValue(m_offsetY);
            m_offsetY = m_scrollbar->value();
            redraw();
        }
        return;
        //        redraw();
    }

    gGraph *g = nullptr;
    int group = 0;

    // Pick the first valid graph in the primary group
    for (const auto & gr : m_graphs) {
        if (gr->group() == group) {
            if (!gr->isEmpty() && gr->visible()) {
                g = gr;
                break;
            }
        }
    }

    if (!g) {
        for (const auto & gr : m_graphs) {
            if (!gr->isEmpty()) {
                g = gr;
                group = g->group();
                break;
            }
        }
    }

    if (!g) { return; }

    g->keyPressEvent(event);

    if (event->key() == Qt::Key_Left) {
        double xx = g->max_x - g->min_x;
        double zoom = 8.0;

        if (event->modifiers() & Qt::ControlModifier) { zoom /= 4; }

        g->min_x -= xx / zoom;;
        g->max_x = g->min_x + xx;

        if (g->min_x < g->rmin_x) {
            g->min_x = g->rmin_x;
            g->max_x = g->rmin_x + xx;
        }

        saveHistory();
        SetXBounds(g->min_x, g->max_x, group);
    } else if (event->key() == Qt::Key_Right) {
        double xx = g->max_x - g->min_x;
        double zoom = 8.0;

        if (event->modifiers() & Qt::ControlModifier) { zoom /= 4; }

        g->min_x += xx / zoom;
        g->max_x = g->min_x + xx;

        if (g->max_x > g->rmax_x) {
            g->max_x = g->rmax_x;
            g->min_x = g->rmax_x - xx;
        }

        saveHistory();
        SetXBounds(g->min_x, g->max_x, group);
    } else if (event->key() == Qt::Key_Up) {
        float zoom = 0.75F;

        if (event->modifiers() & Qt::ControlModifier) { zoom /= 1.5; }

        g->ZoomX(zoom, 0); // zoom in.
    } else if (event->key() == Qt::Key_Down) {
        float zoom = 1.33F;

        if (event->modifiers() & Qt::ControlModifier) { zoom *= 1.5; }

        g->ZoomX(zoom, 0); // Zoom out
    }

    //qDebug() << "Keypress??";
}

// Sends day object to be distributed to all Graphs Layers objects
void gGraphView::setDay(Day *day)
{

    m_day = day;

    for (const auto & g : m_graphs) {
        if (g) g->setDay(day);
    }

    ResetBounds(false);
}

bool gGraphView::isEmpty()
{
    bool res = true;

    for (const auto & graph : m_graphs) {
        if (!graph->isSnapshot() && !graph->isEmpty()) {
            res = false;
            break;
        }
    }

    return res;
}

void gGraphView::refreshTimeout()
{
    if (this->isVisible()) {
        redraw();
    }
}
void gGraphView::timedRedraw(int ms)
{

    if (timer->isActive()) {
        if (ms == 0) {
            timer->stop();
        } else {
            int m = timer->remainingTime();
            if (m > ms) {
                timer->stop();
            } else return;
       }
    }
    timer->setSingleShot(true);
    timer->start(ms);
}

void gGraphView::deselect()
{
    for (auto & graph : m_graphs) {
        if (graph) graph->deselect();
    }
}

void gGraphView::resetLayout()
{
    int default_height = AppSetting->graphHeight();

    for (auto & graph : m_graphs) {
        if (graph) graph->setHeight(default_height);
    }

    updateScale();
    timedRedraw(0);
}
// Reset order of current graphs to new order, remove pinning
void gGraphView::resetGraphOrder(bool pinFirst, const QList<QString> graphOrder) {
//    qDebug() << "gGraphView::resetGraphOrder new order" << graphOrder;
    QList<gGraph *> new_graphs;
    QList<gGraph *> old_graphs = m_graphs;

    // Create new_graphs in order specified by graphOrder
    for (int i = 0; i < graphOrder.size(); ++i) {
        QString nextGraph = graphOrder.at(i);
        auto it = m_graphsbyname.find(nextGraph);
        if (it == m_graphsbyname.end()) {
            qDebug() << "resetGraphOrder could not find" << nextGraph;
            continue;  // should not happen
        }
        gGraph * graph = it.value();
        new_graphs.append(graph);
        int idx = old_graphs.indexOf(graph);
        old_graphs.removeAt(idx);
//        qDebug() << "resetGraphOrder added to new graphs" << nextGraph;
    }
    // If we didn't find everything, append anything extra we have
    for (int i = 0; i < old_graphs.size(); i++) {
        qDebug() << "resetGraphOrder added leftover" << old_graphs.at(i)->name();
        new_graphs.append(old_graphs.at(i));
    }

    m_graphs = new_graphs;

    for (auto & graph : m_graphs) {
        if (!graph) continue;
        if (graph->isSnapshot()) continue;
        graph->setPinned(false);
    }
    if (pinFirst)
        m_graphs[0]->setPinned(true);
}

// Reset order of current graphs to match defaults, remove pinning
void gGraphView::resetGraphOrder(bool pinFirst) {
    m_graphs = m_default_graphs;

    for (auto & graph : m_graphs) {
        if (!graph) continue;
        if (graph->isSnapshot()) continue;
        graph->setPinned(false);
    }
    if (pinFirst)
        m_graphs[0]->setPinned(true);
}

void gGraphView::SaveDefaultSettings() {
    m_default_graphs = m_graphs;
}

const quint32 gvmagic = 0x41756728;
const quint16 gvversion = 4;

void gGraphView::SaveSettings(QString title)
{
    qDebug() << "Saving" << title << "settings";
    QString filename = p_profile->Get("{DataFolder}/") + title.toLower() + ".shg";
    QFile f(filename);
    f.open(QFile::WriteOnly);
    QDataStream out(&f);
    out.setVersion(QDataStream::Qt_4_6);
    out.setByteOrder(QDataStream::LittleEndian);

    out << (quint32)gvmagic;
    out << (quint16)gvversion;

    out << (qint16)size();

    for (auto & graph : m_graphs) {
        if (!graph) continue;
        if (graph->isSnapshot()) continue;
// qDebug() << "Saving graph" << title << graph->name();
        out << graph->name();
        out << graph->height();
        out << graph->visible();
        out << graph->RecMinY();
        out << graph->RecMaxY();
        out << (short)graph->zoomY();   // the return type of zoomY was changed from a short to an enum (int) so much type cast it here
        out << (bool)graph->isPinned();

        gLineChart * lc = dynamic_cast<gLineChart *>(findLayer(graph, LT_LineChart));
        if (lc) {
            out << (quint32)LT_LineChart;
            out << lc->m_flags_enabled;
            out << lc->m_enabled;
            out << lc->m_dot_enabled;
        } else {
            out << (quint32)LT_Other;
        }


    }

    f.close();
}


// Merge and overwrite two hashes. (We can't use QHash::unite because it doesn't overwrite.)
// This is useful for loading settings, where we want to leave the defaults alone for features
// that don't yet have settings specified.
template <class T> inline void hashMerge(T & a, const T & b)
{
    for (auto key : b.keys()) {
        a[key] = b[key];
    }
}


bool gGraphView::LoadSettings(QString title)
{
    QString filename = p_profile->Get("{DataFolder}/") + title.toLower() + ".shg";
    QFile f(filename);

    if (!f.exists()) {
        return false;
    }

    f.open(QFile::ReadOnly);
    QDataStream in(&f);
    in.setVersion(QDataStream::Qt_4_6);
    in.setByteOrder(QDataStream::LittleEndian);

    quint32 t1;
    quint16 version;

    in >> t1;

    if (t1 != gvmagic) {
        qDebug() << "gGraphView" << title << "settings magic doesn't match" << t1 << gvmagic;
        return false;
    }

    in >> version;

    if (version < gvversion) {
        qDebug() << "gGraphView" << title << "settings will be upgraded.";
    }

    qint16 siz;
    in >> siz;
    QString name;
    float hght;
    bool vis;
    EventDataType recminy, recmaxy;
    bool pinned;

    short zoomy = 0;

    QList<gGraph *> neworder;
    QHash<QString, gGraph *>::iterator gi;

    for (int i = 0; i < siz; i++) {
        in >> name;
        in >> hght;
        in >> vis;
        in >> recminy;
        in >> recmaxy;
//qDebug() << "Loading graph" << title << name;
        if (gvversion >= 1) {
            in >> zoomy;
        }

        if (gvversion >= 2) {
            in >> pinned;
        }

        QHash<ChannelID, bool> flags_enabled;
        QHash<ChannelID, bool> plots_enabled;
        QHash<ChannelID, QHash<quint32, bool> > dot_enabled;

        // Warning: Do not break the follow section up!!!
        quint32 layertype;
        if (gvversion >= 4) {
            in >> layertype;
            if (layertype == LT_LineChart) {
                in >> flags_enabled;
                in >> plots_enabled;
                in >> dot_enabled;
            }
        }

        gGraph *g = nullptr;

        if (version <= 2) {
            continue;
//            // Names were stored as translated strings, so look up title instead.
//            g = nullptr;
//            for (int z=0; z<m_graphs.size(); ++z) {
//                if (m_graphs[z]->title() == name) {
//                    g = m_graphs[z];
//                    break;
//                }
//            }
        } else {
            gi = m_graphsbyname.find(name);
            if (gi == m_graphsbyname.end()) {
                qDebug() << "Graph" << name << "has been renamed or removed";
            } else {
                g = gi.value();
            }
        }
        if (g) {
            neworder.push_back(g);
            g->setHeight(hght);
            g->setVisible(vis);
            g->setRecMinY(recminy);
            g->setRecMaxY(recmaxy);
            g->setZoomY(static_cast<ZoomyScaling>(zoomy));
            g->setPinned(pinned);

            if (gvversion >= 4) {
                if (layertype == LT_LineChart) {
                    gLineChart * lc = dynamic_cast<gLineChart *>(findLayer(g, LT_LineChart));
                    if (lc) {
                        hashMerge(lc->m_flags_enabled, flags_enabled);
                        hashMerge(lc->m_enabled, plots_enabled);
                        hashMerge(lc->m_dot_enabled, dot_enabled);
                    }
                }
            }

        }
    }

    if (neworder.size() == m_graphs.size()) {
        m_graphs = neworder;
    }

    f.close();
    updateScale();
    return true;
}

gGraph *gGraphView::findGraph(QString name)
{
    auto it = m_graphsbyname.find(name);

    if (it == m_graphsbyname.end()) { return nullptr; }

    return it.value();
}

gGraph *gGraphView::findGraphTitle(QString title)
{
    for (auto & graph : m_graphs) {
        if (graph->title() == title) return graph;
    }
    return nullptr;
}

int gGraphView::visibleGraphs()
{
    int cnt = 0;

    for (auto & graph : m_graphs) {
        if (graph->visible() && !graph->isEmpty()) { cnt++; }
    }

    return cnt;
}

void gGraphView::dataChanged()
{
    for (auto & graph : m_graphs) {
        graph->dataChanged();
    }
}


void gGraphView::redraw()
{
#ifdef BROKEN_OPENGL_BUILD
    repaint();
#else
    update();
#endif
}